CVE-2026-103594
WatchGuard Fireware OS
- WatchGuard Fireware OS
- Critical
- CVSS 9.5
- Fixed version listed
What to do
Fixed version listed
Affected products
| Product | Affected | Fixed in |
|---|---|---|
| WatchGuard Fireware OS (Default) | from 2026.2, before 2026.4; from 12.12, before 12.12.4 | 2026.4, 12.12.4 |
Advisories and fixes
- Vendor advisory psirt.watchguard.com
Scores and signals
- Exploitation
- No known exploitation
- Severity
- Critical, CVSS 9.5 (v4.0, scored by WatchGuard)
- Weakness
- CWE-121: CWE-121; CWE-1284: CWE-1284; CWE-787: CWE-787
- Vendor
- WatchGuard, Fireware OS
Timeline
- First listed as critical by cve.now. Affected and fixed versions come from the CVE record, once one is published.