# What is CVE-2023-28831? > CVE-2023-28831 is a high-severity flaw (CVSS 7.5) in Simatic Cloud Connect 7 Cc712 Firmware from Siemens, published on 12 September 2023. 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 1.1%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2023-28831 ## 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:** 48 out of 100 (Medium); action: Plan remediation. Kept up to date as the evidence changes. - **Severity:** High (CVSS 7.5 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:** 1.1% (latest exploit-likelihood forecast) - **Published:** 12 September 2023 - **Record last updated:** 18 August 2025 - **Main product:** Simatic Cloud Connect 7 Cc712 Firmware from Siemens - **Affected products:** 78 ## What is CVE-2023-28831? 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 take it offline. ### The official description The OPC UA implementations (ANSI C and C++) in affected products contain an integer overflow vulnerability that could cause the application to run into an infinite loop during certificate validation. This could allow an unauthenticated remote attacker to create a denial of service condition by sending a specially crafted certificate. ### What kind of flaw is it? - CWE-190: Integer Overflow or Wraparound ### 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 take it offline Severity vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H` ## Is CVE-2023-28831 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 1.1%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 1.1%, 1.1%, 1.1%, 1.1%, 1.1%, 1.1%, 1.1%. ### Timeline - 12 September 2023: Published - 18 August 2025: Record last updated ### How Precursor Intelligence ranks it CVE-2023-28831 scores **48 out of 100 (Medium)**, with the action "Plan remediation". 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-2023-28831? The published record lists 78 products. Versions are as published: "before 2.2" means every version up to, but not including, 2.2. - [Simatic Cloud Connect 7 Cc712 Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cloud_connect_7_cc712_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.2 - [Simatic Cloud Connect 7 Cc716 Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cloud_connect_7_cc716_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.2 - [Simatic Drive Controller CPU 1504d Tf Firmware](https://www.precursorintelligence.com/product/siemens/simatic_drive_controller_cpu_1504d_tf_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.2 - [Simatic Drive Controller CPU 1507d Tf Firmware](https://www.precursorintelligence.com/product/siemens/simatic_drive_controller_cpu_1507d_tf_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic Et 200sp Open Controller CPU Firmware](https://www.precursorintelligence.com/product/siemens/simatic_et_200sp_open_controller_cpu_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1200 CPU Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1200_cpu_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - [Simatic S7-1500 CPU 1510sp F-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1510sp_f-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - [Simatic S7-1500 CPU 1510sp-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1510sp-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 CPU 1511-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1511-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 21.9.7 - [Simatic S7-1500 CPU 1511c-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1511c-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 30.0.0 - [Simatic S7-1500 CPU 1511f-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1511f-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 CPU 1511t-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1511t-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 CPU 1511tf-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1511tf-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - [Simatic S7-1500 CPU 1512c-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1512c-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - [Simatic S7-1500 CPU 1512sp F-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1512sp_f-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - [Simatic S7-1500 CPU 1512sp-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1512sp-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 CPU 1513-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1513-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 CPU 1513f-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1513f-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 CPU 1513r-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1513r-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 CPU 1514sp F-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1514sp_f-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 CPU 1514sp-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1514sp-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - [Simatic S7-1500 CPU 1514spt F-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1514spt_f-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 CPU 1514spt-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1514spt-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 CPU 1515-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1515-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 CPU 1515f-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1515f-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - [Simatic S7-1500 CPU 1515r-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1515r-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 CPU 1515t-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1515t-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - [Simatic S7-1500 CPU 1515tf-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1515tf-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - Simatic S7-1500 CPU 1516-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - Simatic S7-1500 CPU 1516f-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - Simatic S7-1500 CPU 1516t-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - Simatic S7-1500 CPU 1516tf-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - Simatic S7-1500 CPU 1517-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - Simatic S7-1500 CPU 1517f-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 CPU 1517h-3 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1517h-3_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - Simatic S7-1500 CPU 1517t-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - Simatic S7-1500 CPU 1517tf-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - Simatic S7-1500 CPU 1518-4 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 21.9.7 - Simatic S7-1500 CPU 1518-4 Pn/dp Mfp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - Simatic S7-1500 CPU 1518f-4 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - Simatic S7-1500 CPU 1518f-4 Pn/dp Mfp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 CPU 1518hf-4 Pn Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_cpu_1518hf-4_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - Simatic S7-1500 CPU 1518t-4 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - Simatic S7-1500 CPU 1518tf-4 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - Simatic S7-1500 CPU S7-1518-4 Pn/dp Odk Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - Simatic S7-1500 CPU S7-1518f-4 Pn/dp Odk Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 Et 200pro Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_et_200pro_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Simatic S7-1500 Software Controller Firmware](https://www.precursorintelligence.com/product/siemens/simatic_s7-1500_software_controller_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [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): before 2.9.7 - [Siplus Et 200sp CPU 1510sp F-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cpu_1510sp_f-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus Et 200sp CPU 1510sp F-1 Pn Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cpu_1510sp_f-1_pn_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus Et 200sp CPU 1510sp-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cpu_1510sp-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus Et 200sp CPU 1510sp-1 Pn Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cpu_1510sp-1_pn_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus Et 200sp CPU 1512sp F-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cpu_1512sp_f-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus Et 200sp CPU 1512sp F-1 Pn Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cpu_1512sp_f-1_pn_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus Et 200sp CPU 1512sp-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cpu_1512sp-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus Et 200sp CPU 1512sp-1 Pn Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cpu_1512sp-1_pn_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus S7-1500 CPU 1511-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1500_cpu_1511-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus S7-1500 CPU 1511-1 Pn T1 Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1500_cpu_1511-1_pn_t1_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus S7-1500 CPU 1511-1 Pn Tx Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1500_cpu_1511-1_pn_tx_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus S7-1500 CPU 1511f-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1500_cpu_1511f-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus S7-1500 CPU 1513-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1500_cpu_1513-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus S7-1500 CPU 1513f-1 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1500_cpu_1513f-1_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus S7-1500 CPU 1515f-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1500_cpu_1515f-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus S7-1500 CPU 1515f-2 Pn Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1500_cpu_1515f-2_pn_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus S7-1500 CPU 1515f-2 Pn T2 Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1500_cpu_1515f-2_pn_t2_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus S7-1500 CPU 1515r-2 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1500_cpu_1515r-2_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus S7-1500 CPU 1515r-2 Pn Tx Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1500_cpu_1515r-2_pn_tx_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - Siplus S7-1500 CPU 1516-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - Siplus S7-1500 CPU 1516-3 Pn/dp Rail Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - Siplus S7-1500 CPU 1516-3 Pn/dp Tx Rail Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - Siplus S7-1500 CPU 1516f-3 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - Siplus S7-1500 CPU 1516f-3 Pn/dp Rail Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.9.7 - [Siplus S7-1500 CPU 1517h-3 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1500_cpu_1517h-3_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - Siplus S7-1500 CPU 1518-4 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - Siplus S7-1500 CPU 1518-4 Pn/dp Mfp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - Siplus S7-1500 CPU 1518f-4 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 - [Siplus S7-1500 CPU 1518hf-4 Pn Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1500_cpu_1518hf-4_pn_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.3 ## How do I fix CVE-2023-28831? 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 advisories and patch notes 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/html/ssa-118850.html) (Mitigation, Vendor advisory) - [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/html/ssa-711309.html) (Mitigation, Vendor advisory) - [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/pdf/ssa-118850.pdf) (Mitigation, Vendor advisory) - [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/pdf/ssa-711309.pdf) (Vendor advisory) ## Questions ### What is CVE-2023-28831? CVE-2023-28831 is a high-severity flaw in Simatic Cloud Connect 7 Cc712 Firmware from Siemens, published on 12 September 2023. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can take it offline. ### How serious is CVE-2023-28831? It scores 7.5 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2023-28831 is 48 out of 100, which is Medium. Its action is "Plan remediation". No sign of exploitation and a low forecast. Patch it in your normal update cycle. ### Is CVE-2023-28831 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 1.1%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2023-28831 affect? For Simatic Cloud Connect 7 Cc712 Firmware from Siemens: before 2.2. The record lists 78 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2023-28831? 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-2023-28831 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