CVE-2020-7491

Name: CVE-2020-7491
Creator: NVD / NIST
Published: 2020-07-23T21:15:12.113+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.31%

Last modified Jun 17, 2026

CVE-2020-7491 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. **VERSION NOT SUPPORTED WHEN ASSIGNED** A legacy debug port account in TCMs installed in Tricon system versions 10.2.0 through 10.5.3 is visible on the network and could allow inappropriate access. This vulnerability was remediated in TCM version 10.5.4.. EPSS estimates a 1.31% chance of exploitation in the next 30 days.

Description

**VERSION NOT SUPPORTED WHEN ASSIGNED** A legacy debug port account in TCMs installed in Tricon system versions 10.2.0 through 10.5.3 is visible on the network and could allow inappropriate access. This vulnerability was remediated in TCM version 10.5.4.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.31%

67.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Schneider-Electric	Tricon Tcm 4351 Firmware	>= 10.2.0, < 10.5.4
Schneider-Electric	Tricon Tcm 4352 Firmware	>= 10.2.0, < 10.5.4
Schneider-Electric	Tricon Tcm 4351a Firmware	>= 10.2.0, < 10.5.4
Schneider-Electric	Tricon Tcm 4351b Firmware	>= 10.2.0, < 10.5.4
Schneider-Electric	Tricon Tcm 4352a Firmware	>= 10.2.0, < 10.5.4
Schneider-Electric	Tricon Tcm 4352b Firmware	>= 10.2.0, < 10.5.4
Schneider-Electric	Tristation 1131 Firmware	>= 1.0.0, <= 4.9.0
Schneider-Electric	Tristation 1131 Firmware	>= 4.10.0, <= 4.12.0

References

https://us-cert.cisa.gov/ics/advisories/icsa-20-205-01Third Party Advisory, US Government Resource
https://www.se.com/ww/en/download/document/SESB-2020-105-01/Vendor Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-20-205-01Third Party Advisory, US Government Resource
https://www.se.com/ww/en/download/document/SESB-2020-105-01/Vendor Advisory

Timeline

Published: Jul 23, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-7491?

How severe is CVE-2020-7491?

CVE-2020-7491 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.31% probability of exploitation in the next 30 days.

How do I fix CVE-2020-7491?

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-2020-7491?

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

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Source: NVD / NIST