CVE-2026-93866
Fireware OS Pre-Authentication Integer Overflow in Access Portal Allows Out-of-Bounds Write
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-190 CWE-288 CWE-787 |
| Vendor | watchguard |
| Product | fireware os |
| Published | Oct 27, 2026 |
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Affected Versions
WatchGuard / Fireware OS
2025.1 < 2026.4 12.0 < 12.12.4
WatchGuard / Fireware OS
12.0 < 12.5.22
References
Credits
Laurent GAFFIE , secorizon.com