Vulnerability Intelligence Report
Fireware OS Stack Buffer Overflow in WireGuard Configuration Allows Remote Code Execution
CVE-2026-103594
A stack-based buffer overflow vulnerability in Fireware OS's WireGuard configuration processing allows a remote attacker that has man-in-the-middle TLS-decrypted access between the Firebox and WatchGuard Cloud to create a Denial of Service condition and potentially execute arbitrary code by tampering with a FireCloud Gateway configuration payload.
No Active Exploit Signals
CVSS Base Score
9.5
CRITICAL
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
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SSVC Action
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Weaknesses (CWE)
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| WatchGuard | Fireware OS | 2026.2 < 2026.4 (affected), 12.12 < 12.12.4 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | WatchGuard Technologies, Inc. · Vendor · USA |
| Reserved | 2026-09-30T22:34:27 |
| Published | 2026-10-27T15:52:27 |
| Last Updated | 2026-10-27T15:52:27 |
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