Vulnerability · Published Aug 19, 2026 · Assigned by ibm

CVE-2026-18681This Power System Buffer Overflow

Medium 6.8

In plain English

A medium-severity stack buffer overflow in Server Firmware from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).

Severity (CVSS 3.1)6.8Medium

Exploit odds (30 days)0.3%top 72.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
IBM	Server Firmware	FW1120.00FW1110.00 – through FW1110.30FW1060.00 – through FW1060.80FW950.00 – through FW950.H2

Weakness: CWE-121 · Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

https://www.ibm.com/support/pages/node/7283899 vendor-advisory, patch