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Fencer Vulns
high 7.8

CVE-2020-12497 in the critical feed json

Phoenix Contact Automation Worx <= 1.87: stack-based overflow

published 2020-07-01 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-4799

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
14.7%
EPSS 14.7% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

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.

Patch / fix

  • phoenixcontact pc_worx 1.87

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-20-191-01 updated cvss 7.8

Phoenix Contact Automation Worx Software Suite

  • Phoenix Contact PC Worx <= 1.87 Phoenix Contact PC Worx Express <= 1.87
    affected: mitigation

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

14.67% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

  • Phoenix Contact Automation Worx
  • Phoenix Contact Automation Worx Express

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.