Buffer overflow in IBM Power Systems Firmware
CVE-2026-16687
IBM Power Systems 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 ASMI web interface. An unauthenticated attacker with network access can send the FSP a malformed request, allowing arbitrary code execution, giving the attacker full control over the managed system, resulting in a confidentiality, integrity, and availability impact.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Ibm Power Systems Firmware — versions FW1120.00
Weakness classification (CWE)
References
- psirt@us.ibm.com (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-16687?
- CVE-2026-16687 is a critical-severity vulnerability in IBM Power Systems Firmware, classified under Stack-based Buffer Overflow. CVSS score: 9.6/10. Published 2026-08-19.
- How severe is CVE-2026-16687?
- Critical severity. CVSS v3 base score is 9.6 out of 10.