IBM Power Systems Firmware pre-FW1120.00 Host Firmware Parsing RCE
CVE-2026-17093 Published on August 19, 2026
Power System Buffer Overflow
IBM 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 (Power9), and OP940.00 - OP940.81 (Power HMC) is affected by a vulnerability in host firmware configuration parsing. An attacker with service-level access to the BMC/FSP can supply specially crafted configuration data, compromising the host firmware boot stage and everything subsequently loaded by it, resulting in a confidentiality, integrity, and availability impact to the managed system.
Vulnerability Analysis
CVE-2026-17093 can be exploited with local system access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Stack Overflow Vulnerability?
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CVE-2026-17093 has been classified to as a Stack Overflow vulnerability or weakness.
Products Associated with CVE-2026-17093
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Affected Versions
IBM Power Systems Firmware:- Version FW1120.00 is affected.
- Version FW1110.00, <= FW1110.30 is affected.
- Version FW1060.00, <= FW1060.80 is affected.
- Version FW950.00, <= FW950.H2 is affected.
- Version OP940.00, <= OP940.a1 is affected.
- Version OP940.00, <= OP940.81 is affected.