CVE-2020-12516
No exploitation reported by the sources we read.
- Published2020-12-10
- WeaknessCWE-400
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2020-12-1003:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-12516?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-12516?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | ≥ fw1, ≤ fw10 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | ≥ fw1, ≤ fw10 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | ≥ fw1, ≤ fw10 | no fix published | NVD |
7 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
WAGO Series 750-88x and 750-352 (Update A)
750-352: versions prior to FW11 · 750-885: versions prior to FW11 · 750-882: versions prior to FW11 · +7 more
Fix
- Mitigation from the vendor CISA ICSA-20-308-01 · 10 productsWAGO recommends updating to the latest firmware, Version FW14
- Mitigation from the vendor CISA ICSA-20-308-01 · 10 productsRestrict network access to the device.
- Mitigation from the vendor CISA ICSA-20-308-01 · 10 productsDo not directly connect the device to the Internet.
- Mitigation from the vendor CISA ICSA-20-308-01 · 10 productsDisable unused TCP/UDP ports.
- Mitigation from the vendor CISA ICSA-20-308-01 · 10 productsCERT@VDE has published an advisory regarding this vulnerability.
Advisories and patches
- cert.vde.comPatch
- us-cert.cisa.govMitigation
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- CNACVSS 3.17.5read 2026-10-23
- NVDCVSS 3.17.5read 2026-10-23
- NVDCVSS 2.05read 2026-10-23
- CNAweakness (CWE)CWE-400read 2026-10-23
- FIRST EPSSEPSS score1.9 %2026-10-22
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2020-12-10
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-12516?
Is CVE-2020-12516 actively exploited?
What is the CVSS score for CVE-2020-12516?
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Related vulnerabilities
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