CVE-2026-16933: high-severity vulnerability in IBM Power Systems Firmware
Power System Integer Overflow
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.2%
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 through OP940.81 (Power HMC) is affected by a vulnerability in the interface between the BMC/FSP and the host system. An attacker with service account or root access to the BMC/FSP can read and write arbitrary regions of host system memory, giving full control over the host system and all hosted partitions, resulting in a confidentiality, integrity, and availability impact.
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected products
IBM · Power Systems FirmwareRelated CVEs — IBM Power Systems Firmware
In the same product, most dangerous first.
CVE-2026-16835CRITICALPower System Improper Certificate ValidationEPSS 0.4%CVE-2026-16687CRITICALPower System Buffer OverflowEPSS 0.3%CVE-2026-16832HIGHPower System Buffer OverflowEPSS 0.3%CVE-2026-16828HIGHPower System Out-of-bounds ReadEPSS 0.3%CVE-2026-16938MEDIUMPower System Missing AuthorizationEPSS 0.2%CVE-2026-16930HIGHPower System Missing AuthorizationEPSS 0.2%