Buffer overflow in IBM Server Firmware
CVE-2026-18681
IBM Server Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the FSP firmware update process. An attacker with authenticated administrator-level access to the FSP can, under specific conditions, execute arbitrary code, resulting in a confidentiality, integrity, and availability impact.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Ibm Server Firmware — versions FW1120.00
Weakness classification (CWE)
References
- psirt@us.ibm.com (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-18681?
- CVE-2026-18681 is a medium-severity vulnerability in IBM Server Firmware, classified under Stack-based Buffer Overflow. CVSS score: 6.8/10. Published 2026-08-19.
- How severe is CVE-2026-18681?
- Medium severity. CVSS v3 base score is 6.8 out of 10.