CVE-2026-16835 PUBLISHED

Power System Improper Certificate Validation

Assigner: ibm
Reserved: 24.07.2026 Published: 19.08.2026 Updated: 19.08.2026

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 the FSP management network protocol. An unauthenticated attacker on the management network can bypass authentication and perform any administrative operation on the managed system, including control of partition power state, configuration, and console access across all hosted partitions, resulting in a confidentiality, integrity, and availability impact to the managed system.

Metrics

CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS Score: 9.6

Product Status

Vendor IBM
Product Power Systems Firmware
Versions
  • Version FW1120.00 is affected
  • affected from FW1110.00 to FW1110.30 (incl.)
  • affected from FW1060.00 to FW1060.80 (incl.)
  • affected from FW950.00 to FW950.H2 (incl.)

Workarounds

Protect access to the FSP's network interface.

Solutions

IBM strongly recommends customers with the products below install FW1120.01(1120_167), FW1110.31(1110_134) or newer to remediate this vulnerability as soon as possible.

Power 11 1) IBM Power System E1180 (9080-HEU)

IBM strongly recommends customers with the products below install FW1060.81(1060_184) or newer to remediate this vulnerability as soon as possible.

Power 10 1) IBM Power System E1080 (9080-HEX)

IBM strongly recommends customers with the products below install FW950.H3(950_230) or newer to remediate this vulnerability as soon as possible.

Power 9 1) IBM Power System S922 (9009-22G) 2) IBM Power System H922 (9223-22S) 3) IBM Power System S914 (9009-41G) 4) IBM Power System S924 (9009-42G) 5) IBM Power System H924 (9223-42S) 6) IBM Power System E950 (9040-MR9) 7) IBM Power System E980 (9080-M9S)

The images mentioned above can be located at IBM Fix Central : https://www.ibm.com/support/fixcentral/

References

Problem Types

  • CWE-295 Improper Certificate Validation CWE