CVE-2025-11566 Auth bypass in PowerChute™ Serial Shutdown
An attacker on the local network can bypass authentication limits to gain user account access via the shutdown endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-11566?
CVE-2025-11566 is a medium-severity authentication bypass vulnerability in Schneider Electric PowerChute™ Serial Shutdown, published on 12 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
CWE-307: Improper Restriction of Excessive Authentication Attempts vulnerability exists that would allow an attacker on the local network to gain access to the user account by performing an arbitrary number of authentication attempts with different credentials on the /REST/shutdownnow endpoint.
Weakness: CWE-307
Which versions are affected by CVE-2025-11566?
How do I fix CVE-2025-11566?
No fix has been published for CVE-2025-11566 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-11566 being exploited?
There is no known exploitation of CVE-2025-11566 in the wild and no public exploit code.
Sources
Also known as GHSA-w9rv-x77p-3mvc.