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

Weakness classification (CWE)

References

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.