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Vulnerability · Published Aug 19, 2026 · Assigned by ibm

CVE-2026-17100Power System Out-of-bounds Write

High 8.2

In plain English

A high-severity out-of-bounds write in Power Systems 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 0.2% (higher than 6% of all known vulnerabilities).

Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.2%top 93.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2, OP940.00 through OP940.a1, and OP940.00 - OP940.81 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the BMC/FSP can exploit this vulnerability, allowing arbitrary code to be executed in the host firmware runtime, giving full control over the managed system, resulting in a confidentiality, integrity, and availability impact to the managed system.

Affected products (as reported)

VendorProductVersions
IBM Power Systems Firmware FW1120.00FW1110.00 – through FW1110.30FW1060.00 – through FW1060.80FW950.00 – through FW950.H2OP940.00 – through OP940.a1OP940.00 – through OP940.81

Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References