CVE-2023-2538

Name: CVE-2023-2538
Creator: NVD / NIST
Published: 2023-07-05T13:15:09.54+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.2/10EPSS 0.20%

Last modified Jun 17, 2026

CVE-2023-2538 is a medium-severity vulnerability rated 4.2/10 on the CVSS scale. A CWE-552 "Files or Directories Accessible to External Parties” in the web interface of the Tyan S5552 BMC version 3.00 allows an unauthenticated remote attacker to retrieve the private key of the TLS certificate in use by the BMC via forced browsing. This can then be abused to perform Man-in-the-Middle (MitM) attacks against victims that access the web interface through HTTPS.. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

Description

A CWE-552 "Files or Directories Accessible to External Parties” in the web interface of the Tyan S5552 BMC version 3.00 allows an unauthenticated remote attacker to retrieve the private key of the TLS certificate in use by the BMC via forced browsing. This can then be abused to perform Man-in-the-Middle (MitM) attacks against victims that access the web interface through HTTPS.

Metrics

CVSS 3.1

4.2/10

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

EPSS Probability

0.20%

9.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Tyan	S5552\/S5552wgm4nr-Ex Firmware	3.0.0
Tyan	S5552\/S5552wgm4nr Firmware	3.0.0
Tyan	S5552\/S5552gm4nr Firmware	3.0.0
Tyan	S5552\/S5552gm2nr Firmware	3.0.0

References

https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2023-2538/Third Party Advisory
https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2023-2538/Third Party Advisory

Timeline

Published: Jul 5, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-2538?

How severe is CVE-2023-2538?

CVE-2023-2538 has a CVSS score of 4.2/10 (MEDIUM severity). The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.

How do I fix CVE-2023-2538?

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-2023-2538?

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

Scan your code now

Source: NVD / NIST