How severe is CVE-2020-7491?

CVE-2020-7491 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-7491 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-7491?

CVE-2020-7491 primarily affects Schneider-electric Tricon Tcm 4351 Firmware. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-7491?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-7491 published?

CVE-2020-7491 was published on 2020-07-23 and last updated on 2026-06-17.

CVE-2020-7491

CVE-2020-7491 is a high-severity vulnerability in Schneider-electric Tricon Tcm 4351 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Schneider-electric Tricon Tcm 4351 Firmware
Published: 2020-07-23
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-7491?: **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.
How severe is CVE-2020-7491?: CVE-2020-7491 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-7491 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-7491?: CVE-2020-7491 primarily affects Schneider-electric Tricon Tcm 4351 Firmware. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-7491?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-7491 published?: CVE-2020-7491 was published on 2020-07-23 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:o:schneider-electric:tricon_tcm_4351_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tricon_tcm_4352_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tricon_tcm_4351a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tricon_tcm_4351b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tricon_tcm_4352a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tricon_tcm_4352b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:tristation_1131_firmware:*:*:*:*:*:*:*:*

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