CVE-2020-7491
**VERSION NOT SUPPORTED WHEN ASSIGNED** A legacy debug port account in TCMs installed in Tricon...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2020-7491- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2020-7491- Updated
- 2026-11-02
EUVDEUVD-2020-28616 No score
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.
- Record
EUVD-2020-28616- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6q95-r497-79jw
**VERSION NOT SUPPORTED WHEN ASSIGNED** A legacy debug port account in TCMs installed in Tricon...
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.
- Record
GHSA-6q95-r497-79jw- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
Affected products
- schneider-electric tricon tcm 4351 firmware
- schneider-electric tricon tcm 4351a firmware
- schneider-electric tricon tcm 4351b firmware
- schneider-electric tricon tcm 4352 firmware
- schneider-electric tricon tcm 4352a firmware
- schneider-electric tricon tcm 4352b firmware
- schneider-electric tristation 1131 firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-7491 is a high vulnerability (CVSS 7.5) in Schneider-electric Tricon Tcm 4351 Firmware, published July 23, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.31%, the 70th percentile. No source names a fixed version.