CVE-2026-86101 Fireware OS Authorization Bypass in SAML Login Allows Unauthorized SSLVPN Access
Remote authenticated SAML users can bypass authorization to gain unauthorized SSL VPN access on WatchGuard Fireware OS devices.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86101?
CVE-2026-86101 is a high-severity authentication bypass vulnerability in Watchguard Fireware, published on 29 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An improper authorization vulnerability in WatchGuard Fireware OS's SAML login process allows a remote, authenticated SAML user with access only to the Access Portal to obtain unauthorized Mobile VPN with SSL access through a specially crafted request.
Which versions are affected by CVE-2026-86101?
It affects 1 product.
Products include Watchguard Fireware.
How do I fix CVE-2026-86101?
No fix has been published for CVE-2026-86101 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-2026-86101 being exploited?
There is no known exploitation of CVE-2026-86101 in the wild and no public exploit code.
Other vulnerabilities in Watchguard Fireware
Sources
Also known as GHSA-jrch-5qv6-q7m4.