Vulnerability · Published Aug 19, 2026 · Assigned by ibm

CVE-2026-16835Power System Improper Certificate Validation

Critical 9.6

In plain English

A critical-severity improper certificate validation 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 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)9.6Critical

Exploit odds (30 days)0.4%top 70.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
IBM	Power Systems Firmware	FW1120.00FW1110.00 – through FW1110.30FW1060.00 – through FW1060.80FW950.00 – through FW950.H2

Weakness: CWE-295 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

https://www.ibm.com/support/pages/node/7283894 vendor-advisory, patch