CVE-2026-16687 Power System Buffer Overflow
Unauthenticated attackers can execute arbitrary code on IBM Power Systems via a buffer overflow in the ASMI web interface, gaining full system control.
- 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-2026-16687?
CVE-2026-16687 is a critical memory corruption vulnerability in IBM Power Systems Firmware, published on 19 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
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 ASMI web interface. An unauthenticated attacker with network access can send the FSP a malformed request, allowing arbitrary code execution, giving the attacker full control over the managed system, resulting in a confidentiality, integrity, and availability impact.
Weakness: CWE-121
Which versions are affected by CVE-2026-16687?
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-2026-16687?
No fix has been published for CVE-2026-16687 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-2026-16687 being exploited?
There is no known exploitation of CVE-2026-16687 in the wild and no public exploit code.
Other vulnerabilities in IBM Power Systems Firmware
Sources
Also known as GHSA-p7wp-9r3f-5rpv.