PatchTheCVECVE-2023-2538: A CWE-552 "Files or Directories Accessible to External Parties” in the web interface of the Tyan S5552 BMC ver
CVE-2023-2538 is a medium-severity flaw (CVSS 5.8) affecting s5552\/s5552wgm4nr-ex firmware, s5552\/s5552wgm4nr firmware, s5552\/s5552gm4nr firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- No elevated risk signals yet
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 5.8 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.2% (top 85%) |
| CISA exploited list | No |
| Weakness | CWE-552 |
| Published | 2023-07-05 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2023-2538?
s5552\/s5552wgm4nr-ex firmware: mitigate or apply the listed mitigation; s5552\/s5552wgm4nr firmware: mitigate or apply the listed mitigation; s5552\/s5552gm4nr firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2023-2538 being exploited?
CVE-2023-2538 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2023-2538 affect?
CVE-2023-2538 affects s5552\/s5552wgm4nr-ex firmware, s5552\/s5552wgm4nr firmware, s5552\/s5552gm4nr firmware. Severity is medium (CVSS 5.8). 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 force
How urgent is CVE-2023-2538?
Priority 24/100. No elevated risk signals yet.