CVE-2026-2402 Auth bypass in PowerChute™ Serial Shutdown

Medium 6.9 Published 14 Apr 2026 Updated 14 Apr 2026

Attackers can bypass authentication limits to take over user accounts via excessive login attempts on PowerChute Serial Shutdown.

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-2026-2402?

CVE-2026-2402 is a medium-severity authentication bypass vulnerability in Schneider Electric PowerChute™ Serial Shutdown, published on 14 Apr 2026. 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 to gain access to the user account by performing an arbitrary number of authentication attempts with different credentials on a sequence of requests to multiple endpoints.

Weakness: CWE-307

Which versions are affected by CVE-2026-2402?

It affects 1 product.

Products include Schneider-Electric Powerchute Serial Shutdown.

How do I fix CVE-2026-2402?

No fix has been published for CVE-2026-2402 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-2026-2402 being exploited?

There is no known exploitation of CVE-2026-2402 in the wild and no public exploit code.

Sources

Also known as GHSA-gwjq-j584-rm32.