CVE-2026-93866
CVE-2026-93866 · Fireware OS Pre-Authentication Integer Overflow in Access Portal Allows Out-of-Bounds Write
This page contains facts from public vulnerability sources. Check the original advisory before updating.
An integer overflow vulnerability in the WebSocket connection handling used by WatchGuard Fireware OS's Access Portal allows a remote, unauthenticated attacker to write beyond the bounds of a heap buffer by sending a specially crafted request while the Access Portal feature is enabled.
CVSS 9.2 · Critical · EPSS 0.4% · Fix available
- Published
- Updated
Affected products and versions
fireware os
- Versions
- ≥ 2025.1, < 2026.4: Affected (custom)
- ≥ 12.0, < 12.12.4: Affected (custom)
Update to 12.12.4; Update to 2026.4
fireware os
- Versions
- ≥ 12.0, < 12.5.22: Affected (custom)
Update to 12.5.22