Buffer overflow in IBM Power System E1080 \(9080-Hex\) 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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (24.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- IBM Power System E1080 \(9080-Hex\) Firmware
- IBM Power System E1180 \(9080-Heu\) Firmware — versions fw1120.00
- IBM Power System E950 \(9040-Mr9\) Firmware
- IBM Power System E980 \(9080-M9s\) Firmware
- IBM Power System H922 \(9223-22s\) Firmware
- IBM Power System H924 \(9223-42s\) Firmware
- IBM Power System S914 \(9009-41g\) Firmware
- IBM Power System S922 \(9009-22g\) Firmware
- IBM Power System S924 \(9009-42g\) Firmware
- IBM Server Firmware — versions FW1120.00
Weakness classification (CWE)
References
- www.ibm.com/support/pages/node/7283899 (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-18681?
- CVE-2026-18681 is a medium-severity vulnerability in IBM Power System E1080 \(9080-Hex\) 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.