CVE-2026-103594
Fireware OS Stack Buffer Overflow in WireGuard Configuration Allows Remote Code Execution
- State
- Published
- Severity
- 9.5 Critical
- Published
- Oct 27, 2026
- Updated
- Oct 27, 2026
- Reserved
- Sep 30, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.5 Critical | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H | WatchGuard |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
Fireware OSWatchGuard |
|
References
- https://psirt.watchguard.com/CVE-2026-103594vendor-advisory
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