CVE-2023-2538: Tyan s5552/s5552gm2nr Firmware

Medium severity, CVSS 4.2. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Tyan s5552/s5552gm2nr Firmware: version 3.0.0 only
• Tyan s5552/s5552gm4nr Firmware: version 3.0.0 only
• Tyan s5552/s5552wgm4nr-Ex Firmware: version 3.0.0 only
• Tyan s5552/s5552wgm4nr Firmware: version 3.0.0 only

Published 2023-07-05. Last modified 2026-06-17.