CVE-2023-31176

Name: CVE-2023-31176
Creator: NVD / NIST
Published: 2023-11-30T17:15:08.52+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.93%

Last modified Jun 17, 2026

CVE-2023-31176 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An Insufficient Entropy vulnerability in the Schweitzer Engineering Laboratories SEL-451 could allow an unauthenticated remote attacker to brute-force session tokens and bypass authentication. See product Instruction Manual Appendix A dated 20230830 for more details. . EPSS estimates a 0.93% chance of exploitation in the next 30 days.

Description

An Insufficient Entropy vulnerability in the Schweitzer Engineering Laboratories SEL-451 could allow an unauthenticated remote attacker to brute-force session tokens and bypass authentication. See product Instruction Manual Appendix A dated 20230830 for more details.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.93%

55.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Selinc	Sel-451 Firmware	>= r315-v0, < r315-v4
Selinc	Sel-451 Firmware	>= r316-v0, < r316-v4
Selinc	Sel-451 Firmware	>= r317-v0, < r317-v4
Selinc	Sel-451 Firmware	>= r318-v0, < r318-v5
Selinc	Sel-451 Firmware	>= r320-v0, < r320-v3
Selinc	Sel-451 Firmware	>= r321-v0, < r321-v3
Selinc	Sel-451 Firmware	>= r322-v0, < r322-v3
Selinc	Sel-451 Firmware	>= r323-v0, < r323-v5
Selinc	Sel-451 Firmware	>= r324-v0, < r324-v4
Selinc	Sel-451 Firmware	>= r325-v0, < r325-v3
Selinc	Sel-451 Firmware	r326-v0
Selinc	Sel-451 Firmware	r327-v0

References

https://selinc.com/support/security-notifications/external-reports/Vendor Advisory
https://www.nozominetworks.com/blog/Third Party Advisory
https://selinc.com/support/security-notifications/external-reports/Vendor Advisory
https://www.nozominetworks.com/blog/Third Party Advisory

Timeline

Published: Nov 30, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-31176?

How severe is CVE-2023-31176?

CVE-2023-31176 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.

How do I fix CVE-2023-31176?

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-2023-31176?

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

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Source: NVD / NIST