# What is CVE-2020-12516? > CVE-2020-12516 is a high-severity flaw (CVSS 7.5) in 750-352 from Wago, published on 10 December 2020. 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 1.9%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2020-12516 ## 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:** 47 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:** 1.9% (latest exploit-likelihood forecast) - **Published:** 10 December 2020 - **Record last updated:** 8 October 2022 - **Main product:** 750-352 from Wago - **Affected products:** 20 ## What is CVE-2020-12516? 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 Older firmware versions (FW1 up to FW10) of the WAGO PLC family 750-88x and 750-352 are vulnerable for a special denial of service attack. ### What kind of flaw is it? - CWE-400: Uncontrolled Resource Consumption ### 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-2020-12516 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 1.9%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 1.9%, 1.9%, 1.9%, 1.9%, 1.9%, 1.9%, 1.9%. ### Timeline - 10 December 2020: Published - 8 October 2022: Record last updated ### How Precursor Intelligence ranks it CVE-2020-12516 scores **47 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-2020-12516? The published record lists 20 products. - [750-352](https://www.precursorintelligence.com/product/wago/750-352) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [750-331](https://www.precursorintelligence.com/product/wago/750-331) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [750-331 Firmware](https://www.precursorintelligence.com/product/wago/750-331_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): fw1 to fw10 - [750-352 Firmware](https://www.precursorintelligence.com/product/wago/750-352_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): fw1 to fw10 - [750-829](https://www.precursorintelligence.com/product/wago/750-829) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [750-829 Firmware](https://www.precursorintelligence.com/product/wago/750-829_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): fw1 to fw10 - [750-831](https://www.precursorintelligence.com/product/wago/750-831) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [750-831 Firmware](https://www.precursorintelligence.com/product/wago/750-831_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): fw1 to fw10 - [750-852](https://www.precursorintelligence.com/product/wago/750-852) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [750-852 Firmware](https://www.precursorintelligence.com/product/wago/750-852_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): fw1 to fw10 - [750-880](https://www.precursorintelligence.com/product/wago/750-880) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [750-880 Firmware](https://www.precursorintelligence.com/product/wago/750-880_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): fw1 to fw10 - [750-881](https://www.precursorintelligence.com/product/wago/750-881) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [750-881 Firmware](https://www.precursorintelligence.com/product/wago/750-881_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): fw1 to fw10 - [750-882](https://www.precursorintelligence.com/product/wago/750-882) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [750-882 Firmware](https://www.precursorintelligence.com/product/wago/750-882_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): fw1 to fw10 - [750-885](https://www.precursorintelligence.com/product/wago/750-885) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [750-885 Firmware](https://www.precursorintelligence.com/product/wago/750-885_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): fw1 to fw10 - [750-889](https://www.precursorintelligence.com/product/wago/750-889) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [750-889 Firmware](https://www.precursorintelligence.com/product/wago/750-889_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): fw1 to fw10 ## How do I fix CVE-2020-12516? 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.vde.com](https://cert.vde.com/en-us/advisories/vde-2020-042) (Patch, Third-party advisory) - [us-cert.cisa.gov](https://us-cert.cisa.gov/ics/advisories/icsa-20-308-01) (Mitigation, Third-party advisory, Government resource) ## Questions ### What is CVE-2020-12516? CVE-2020-12516 is a high-severity flaw in 750-352 from Wago, published on 10 December 2020. 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-2020-12516? It scores 7.5 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2020-12516 is 47 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-2020-12516 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 1.9%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2020-12516 affect? For 750-352 from Wago: version not specified. The record lists 20 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2020-12516? 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-2020-12516 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