7.7High
CVE-2026-8247WatchGuard Firebox admd Out of Bounds Write Vulnerability
Description
An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker on the same local network segment to execute arbitrary code. This vulnerability affects Fireware OS 11.0 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| watchguard | fireware | 11.0.0 – < 11.12.4 | |
| WatchGuard | Fireware OS | 2025.1 – < 2026.2.1, 12.0 – < 12.12.1, 11.0 |
References and patches
- https://psirt.watchguard.com/CVE-2026-8247 vendor-advisoryBroken Link
- https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00026 vendor-advisoryVendor Advisory
CPE matches (NVD) (6)
cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*≥ 11.0.0 < 11.12.4cpe:2.3:o:watchguard:fireware:11.12.4:-:*:*:*:*:*:*cpe:2.3:o:watchguard:fireware:11.12.4:u1:*:*:*:*:*:*cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*≥ 12.5 < 12.5.19cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*≥ 2025.1 < 2026.2.1cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*≥ 12.0 < 12.12.1