# What is CVE-2020-28397? > CVE-2020-28397 is a medium-severity flaw (CVSS 5.3) in Tim 1531 Irc from Siemens, published on 10 August 2021. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 0.8%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2020-28397 ## At a glance - **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle. - **Precursor Intelligence risk score:** 27 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes. - **Severity:** Medium (CVSS 5.3 out of 10) - **Known to be exploited:** No, not on the list of flaws known to be exploited today - **Chance of use in the next 30 days:** 0.8% (latest exploit-likelihood forecast) - **Published:** 10 August 2021 - **Record last updated:** 10 December 2021 - **Main product:** Tim 1531 Irc from Siemens - **Affected products:** 111 ## What is CVE-2020-28397? In plain terms It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can read some data. ### The official description A vulnerability has been identified in SIMATIC Drive Controller family (All versions V2 V2.5 V2.5 < V21.9), TIM 1531 IRC (incl. SIPLUS NET variants) (Version V2.1). Due to an incorrect authorization check in the affected component, an attacker could extract information about access protected PLC program variables over port 102/tcp from an affected device when reading multiple attributes at once. ### What kind of flaw is it? - CWE-863: Incorrect Authorization ### How an attack on it works - Where an attacker can be: Anywhere on the internet - How hard it is to pull off: Easy: no special conditions - Login needed first: No login needed - Does someone have to click: No, nobody has to do anything - What an attacker gets: Can read some data Severity vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N` ## Is CVE-2020-28397 being exploited? Not that we know of It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.8%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 0.8%, 0.8%, 0.8%, 0.8%, 0.8%, 0.8%, 0.8%. ### Timeline - 10 August 2021: Published - 10 December 2021: Record last updated ### How Precursor Intelligence ranks it CVE-2020-28397 scores **27 out of 100 (Low)**, with the action "Monitor". Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less: - Evidence it is being exploited: biggest factor - How severe it is: strong factor - How widely exposed it is: smaller factor - Threat activity around it: smaller factor 85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it. ## Who is affected by CVE-2020-28397? The published record lists 111 products. Versions are as published: "before 2.9.2" means every version up to, but not including, 2.9.2. - [Tim 1531 Irc](https://www.precursorintelligence.com/product/siemens/tim_1531_irc) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1211c](https://www.precursorintelligence.com/product/siemens/cpu_1211c) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1211c Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1211c_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 4.4 - [CPU 1212c](https://www.precursorintelligence.com/product/siemens/cpu_1212c) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1212c Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1212c_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 4.4 - [CPU 1212fc](https://www.precursorintelligence.com/product/siemens/cpu_1212fc) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1212fc Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1212fc_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 4.4 - [CPU 1214c](https://www.precursorintelligence.com/product/siemens/cpu_1214c) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1214c Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1214c_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 4.4 - [CPU 1214fc](https://www.precursorintelligence.com/product/siemens/cpu_1214fc) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1214fc Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1214fc_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 4.4 - [CPU 1215c](https://www.precursorintelligence.com/product/siemens/cpu_1215c) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1215c Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1215c_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 4.4 - [CPU 1215fc](https://www.precursorintelligence.com/product/siemens/cpu_1215fc) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1215fc Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1215fc_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 4.4 - [CPU 1217c](https://www.precursorintelligence.com/product/siemens/cpu_1217c) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1217c Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1217c_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 4.4 - [CPU 1504d Tf](https://www.precursorintelligence.com/product/siemens/cpu_1504d_tf) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1504d Tf Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1504d_tf_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.2 - [CPU 1507d Tf](https://www.precursorintelligence.com/product/siemens/cpu_1507d_tf) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1507d Tf Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1507d_tf_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.2 - [CPU 1510sp-1pn](https://www.precursorintelligence.com/product/siemens/cpu_1510sp-1pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1510sp-1pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1510sp-1pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1511-1pn](https://www.precursorintelligence.com/product/siemens/cpu_1511-1pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1511-1pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1511-1pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1511c-1 Pn](https://www.precursorintelligence.com/product/siemens/cpu_1511c-1_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1511c-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1511c-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1511f-1pn](https://www.precursorintelligence.com/product/siemens/cpu_1511f-1pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1511f-1pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1511f-1pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1511t-1pn](https://www.precursorintelligence.com/product/siemens/cpu_1511t-1pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1511t-1pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1511t-1pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1511tf-1pn](https://www.precursorintelligence.com/product/siemens/cpu_1511tf-1pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1511tf-1pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1511tf-1pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1512c-1 Pn](https://www.precursorintelligence.com/product/siemens/cpu_1512c-1_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1512c-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1512c-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1512sp F-1 Pn](https://www.precursorintelligence.com/product/siemens/cpu_1512sp_f-1_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1512sp F-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1512sp_f-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1512sp-1 Pn](https://www.precursorintelligence.com/product/siemens/cpu_1512sp-1_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1512sp-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1512sp-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1513-1 Pn](https://www.precursorintelligence.com/product/siemens/cpu_1513-1_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1513-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1513-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1513f-1 Pn](https://www.precursorintelligence.com/product/siemens/cpu_1513f-1_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1513f-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1513f-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1513pro F-2 Pn](https://www.precursorintelligence.com/product/siemens/cpu_1513pro_f-2_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1513pro F-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1513pro_f-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1513r-1 Pn](https://www.precursorintelligence.com/product/siemens/cpu_1513r-1_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1513r-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1513r-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1515-2](https://www.precursorintelligence.com/product/siemens/cpu_1515-2) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1515-2 Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1515-2_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1515f-2](https://www.precursorintelligence.com/product/siemens/cpu_1515f-2) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1515f-2 Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1515f-2_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1515r-2 Pn](https://www.precursorintelligence.com/product/siemens/cpu_1515r-2_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1515r-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1515r-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1515sp Pc2 Tf](https://www.precursorintelligence.com/product/siemens/cpu_1515sp_pc2_tf) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1515sp Pc2 Tf Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1515sp_pc2_tf_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 21.9 - [CPU 1515t-2 Pn](https://www.precursorintelligence.com/product/siemens/cpu_1515t-2_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1515t-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1515t-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1515tf-2 Pn](https://www.precursorintelligence.com/product/siemens/cpu_1515tf-2_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1515tf-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1515tf-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1516-3](https://www.precursorintelligence.com/product/siemens/cpu_1516-3) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1516-3 Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1516-3_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1516f-3](https://www.precursorintelligence.com/product/siemens/cpu_1516f-3) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1516f-3 Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1516f-3_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2. - [CPU 1516pro F-2 Pn](https://www.precursorintelligence.com/product/siemens/cpu_1516pro_f-2_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1516pro F-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1516pro_f-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [CPU 1516pro-2 Pn](https://www.precursorintelligence.com/product/siemens/cpu_1516pro-2_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [CPU 1516pro-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/cpu_1516pro-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - CPU 1516t-3 Pn/dp by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - CPU 1516t-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - CPU 1516tf-3 Pn/dp by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - CPU 1516tf-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - CPU 1517-3 Pn/dp by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - CPU 1517-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - CPU 1517f-3 Pn/dp by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - CPU 1517f-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - CPU 1517t-3 Pn/dp by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - CPU 1517t-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - CPU 1517tf-3 Pn/dp by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - CPU 1517tf-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - CPU 1518-4 Pn/dp by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - CPU 1518-4 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - CPU 1518f-4 Pn/dp by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - CPU 1518f-4 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [Cpu1510sp F-1](https://www.precursorintelligence.com/product/siemens/cpu1510sp_f-1) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Cpu1510sp F-1 Firmware](https://www.precursorintelligence.com/product/siemens/cpu1510sp_f-1_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [Simatic S7 Plcsim Advanced](https://www.precursorintelligence.com/product/siemens/simatic_s7_plcsim_advanced) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Simatic S7 Plcsim Advanced Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7_plcsim_advanced_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.0 to before 4.0 - [Simatic S7-1500 Software Controller](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_software_controller) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Application): 2.5 to before 21.9 - [Siplus CPU 1510sp F-1pn](https://www.precursorintelligence.com/product/siemens/siplus_cpu_1510sp_f-1pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Siplus CPU 1510sp F-1pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_cpu_1510sp_f-1pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [Siplus CPU 1511-1 Pn](https://www.precursorintelligence.com/product/siemens/siplus_cpu_1511-1_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Siplus CPU 1511-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_cpu_1511-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [Siplus CPU 1511f-1 Pn](https://www.precursorintelligence.com/product/siemens/siplus_cpu_1511f-1_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Siplus CPU 1511f-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_cpu_1511f-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [Siplus CPU 1512sp F-1pn](https://www.precursorintelligence.com/product/siemens/siplus_cpu_1512sp_f-1pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Siplus CPU 1512sp F-1pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_cpu_1512sp_f-1pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [Siplus CPU 1512sp-1 Pn](https://www.precursorintelligence.com/product/siemens/siplus_cpu_1512sp-1_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Siplus CPU 1512sp-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_cpu_1512sp-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [Siplus CPU 1513-1 Pn](https://www.precursorintelligence.com/product/siemens/siplus_cpu_1513-1_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Siplus CPU 1513-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_cpu_1513-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [Siplus CPU 1513f-1 Pn](https://www.precursorintelligence.com/product/siemens/siplus_cpu_1513f-1_pn) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Siplus CPU 1513f-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_cpu_1513f-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - Siplus CPU 1516-3 Pn/dp by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - Siplus CPU 1516-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - Siplus CPU 1518-4 Pn/dp by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - Siplus CPU 1518-4 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - Siplus CPU 1518f-4 Pn/dp by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - Siplus CPU 1518f-4 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - Siplus CPU-1516f-3 Pn/dp by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - Siplus CPU-1516f-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.5 to before 2.9.2 - [Tim 1531 Irc Firmware](https://www.precursorintelligence.com/product/siemens/tim_1531_irc_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.1 ## How do I fix CVE-2020-28397? 1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list. 2. **Apply the vendor’s fix.** Install the update named in the vendor’s advisory. We’ve put the advisory first in the list. 3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in. 4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood. ### References - [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/pdf/ssa-865327.pdf) (Patch, Vendor advisory) ## Questions ### What is CVE-2020-28397? CVE-2020-28397 is a medium-severity flaw in Tim 1531 Irc from Siemens, published on 10 August 2021. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can read some data. ### How serious is CVE-2020-28397? It scores 5.3 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2020-28397 is 27 out of 100, which is Low. Its action is "Monitor". No sign of exploitation and a low forecast. Patch it in your normal update cycle. ### Is CVE-2020-28397 being exploited? It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.8%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2020-28397 affect? For Tim 1531 Irc from Siemens: version not specified. The record lists 111 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2020-28397? Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet. ## Does CVE-2020-28397 affect you? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact