CVE-2026-93306 This Power System update is being released to address

High 7.1 Published 25 Sep 2026 Updated 26 Sep 2026

An unauthenticated attacker can crash the ASMI web interface via malformed HTTPS requests, causing denial of service and potential memory corruption.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-93306?

CVE-2026-93306 is a high-severity memory corruption vulnerability in IBM Server Firmware, published on 25 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

IBM Server Firmware FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, FW1060.00 through FW1060.81, and FW950.00 through FW950.H3 is affected by a vulnerability in the ASMI web interface. An unauthenticated attacker on the management network can send a malformed HTTPS request to ASMI, causing the web server to crash with possible memory corruption and generate an error log. The ASMI web interface will restart automatically; however, repeated exploitation could result in a sustained loss of access to the ASMI management interface, resulting in an integrity and availability impact.

Weakness: CWE-125

Which versions are affected by CVE-2026-93306?

It affects 9 products.

Products include Ibm Power System E1080 \(9080-Hex\) Firmware, Ibm Power System E1180 \(9080-Heu\) Firmware, Ibm Power System E950 \(9040-Mr9\) Firmware, Ibm Power System E980 \(9080-M9s\) Firmware, Ibm Power System H922 \(9223-22s\) Firmware, Ibm Power System H924 \(9223-42s\) Firmware and 3 more.

How do I fix CVE-2026-93306?

No fix has been published for CVE-2026-93306 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-93306 being exploited?

There is no known exploitation of CVE-2026-93306 in the wild and no public exploit code.

Sources

Also known as GHSA-3947-32c5-3w7r.