CVE-2026-101891 WatchGuard AP Improper Access Control in API Service Allows Unauthenticated Access
Unauthenticated attackers can obtain valid API sessions on WatchGuard Access Points due to improper access control in the internal API service.
- 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-2026-101891?
CVE-2026-101891 is a critical authentication bypass vulnerability in WatchGuard AP, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An improper access control vulnerability in an internal API service on WatchGuard Access Points allows an unauthenticated attacker with network access to the AP to obtain a valid API session.
Which versions are affected by CVE-2026-101891?
How do I fix CVE-2026-101891?
No fix has been published for CVE-2026-101891 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-2026-101891 being exploited?
There is no known exploitation of CVE-2026-101891 in the wild and no public exploit code.
Sources
Also known as GHSA-238m-p2r4-wp6q.