CVE-2026-12661 FactoryTalk® Historian Machine Edition - Out-of-Bounds Write Vulnerability
An authenticated network-adjacent attacker can cause a denial of service in FactoryTalk Historian Machine Edition via crafted requests triggering a buffer overflow.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-12661?
CVE-2026-12661 is a medium-severity memory corruption vulnerability in Rockwell Automation FactoryTalk® Historian Machine Edition, published on 1 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A denial-of-service security issue exists within FactoryTalk® Historian Machine Edition. A network adjacent attacker who is authenticated could send crafted requests to the web interface, resulting in buffer overflow conditions that may cause the device to crash and become unresponsive.
Weakness: CWE-121
Which versions are affected by CVE-2026-12661?
How do I fix CVE-2026-12661?
No fix has been published for CVE-2026-12661 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-2026-12661 being exploited?
There is no known exploitation of CVE-2026-12661 in the wild and no public exploit code.
Sources
Also known as GHSA-h4cr-jvp7-9897.