CVE-2026-16938: medium-severity vulnerability in IBM Power Systems Firmware
Power System Missing Authorization
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.9epss 0.2%
IBM Power Systems 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 access controls over privileged system configuration operations on the FSP. An attacker with authenticated administrator-level access to the FSP can place the managed system into a non-production operational mode, allowing certain system components to be disabled. This condition persists across FSP resets and requires explicit operator intervention — clearing the affected configuration — to restore normal operation. Successful exploitation results in an availability impact to the managed system.
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:L/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-2026-16930HIGHPower System Missing AuthorizationEPSS 0.2%CVE-2026-16933HIGHPower System Integer OverflowEPSS 0.2%