CVE-2020-12497

Name: CVE-2020-12497
Creator: NVD / NIST
Published: 2020-07-01T16:15:12.853+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 14.67%

Last modified Jun 17, 2026

CVE-2020-12497 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 14.67% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

14.67%

96.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Phoenixcontact	Pc Worx	< 1.87
Phoenixcontact	Pc Worx Express	<= 1.87

References

https://cert.vde.com/de-de/advisories/vde-2020-023Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-825/Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-21-398/Third Party Advisory, VDB Entry
https://cert.vde.com/de-de/advisories/vde-2020-023Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-825/Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-21-398/Third Party Advisory, VDB Entry

Timeline

Published: Jul 1, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-12497?

How severe is CVE-2020-12497?

CVE-2020-12497 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 14.67% probability of exploitation in the next 30 days.

How do I fix CVE-2020-12497?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-12497?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST