CVE-2026-93866
Last modified
CVE-2026-93866 is a critical-severity vulnerability rated 9.2/10 on the CVSS scale. 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.. EPSS estimates a 0.45% chance of exploitation in the next 30 days.
Description
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| WatchGuard | Fireware OS | >= 2025.1, < 2026.4; >= 12.0, < 12.12.4 |
| WatchGuard | Fireware OS | >= 12.0, < 12.5.22 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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