CVE-2020-12497
No exploitation reported by the sources we read.
- Published2020-07-01
- Fixed in1.87
- WeaknessCWE-121 · CWE-787
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
PLCopen XML file parsing in Phoenix Contact PC Worx and PC Worx Express version 1.87 and earlier can lead to a stack-based overflow. Manipulated PC Worx projects could lead to a remote code execution due to insufficient input data validation.
Timeline
dates in UTC- 2020-07-0116:15CVE publishedNVD
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-12497?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-12497?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 |
|---|---|---|---|
| 1.87 | < 1.87 | 1.87 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.87 | ≤ 1.87 | no fix published | NVD |
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
Phoenix Contact Automation Worx Software Suite
PC Worx Express: version 1.87 and prior · PC Worx: version 1.87 and prior
Fix
- Update Phoenixcontact pc worx to 1.87
- Mitigation from the vendor CISA ICSA-20-191-01 · 2 productsPhoenix Contact recommends users exchange project files only using secure file exchange services. Project files should not be exchanged via unencrypted email. In addition, we recommend exchanging or storing project files together with a checksum to ensure their integrity.
- Mitigation from the vendor CISA ICSA-20-191-01 · 2 productsWith the next version of Automation Worx Software Suite, a sharpened input data validation, with respect to buffer size and description of size and number of objects referenced in a file, will be implemented.
Advisories and patches
- cert.vde.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Published
- 2020-07-01
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-12497?
Is CVE-2020-12497 actively exploited?
What is the CVSS score for CVE-2020-12497?
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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.