CVE-2023-2538
CVE-2023-2538 is a medium-severity vulnerability in Tyan S5552/s5552wgm4nr-ex Firmware with a CVSS 3.x base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-552.
Key facts
- Severity: Medium (CVSS 3.x base score 5.8)
- EPSS exploit prediction: 0% (15th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-552
- Affected product: Tyan S5552/s5552wgm4nr-ex Firmware
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2023-2538?
- 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.
- How severe is CVE-2023-2538?
- CVE-2023-2538 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
- Is CVE-2023-2538 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-2538?
- CVE-2023-2538 primarily affects Tyan S5552/s5552wgm4nr-ex Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2023-2538?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2023-2538 published?
- CVE-2023-2538 was published on 2023-07-05 and last updated on 2026-06-17.
References
Affected products (4)
- cpe:2.3:o:tyan:s5552\/s5552wgm4nr-ex_firmware:3.0.0:*:*:*:*:*:*:*
- cpe:2.3:o:tyan:s5552\/s5552wgm4nr_firmware:3.0.0:*:*:*:*:*:*:*
- cpe:2.3:o:tyan:s5552\/s5552gm4nr_firmware:3.0.0:*:*:*:*:*:*:*
- cpe:2.3:o:tyan:s5552\/s5552gm2nr_firmware:3.0.0:*:*:*:*:*:*:*
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