CVE-2026-8247
Last modified
CVE-2026-8247 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 0.38% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Watchguard | Fireware | >= 11.0.0, < 11.12.4 |
| Watchguard | Fireware | 11.12.4 |
| Watchguard | Fireware | >= 12.5, < 12.5.19 |
| Watchguard | Fireware | >= 2025.1, < 2026.2.1 |
| Watchguard | Fireware | >= 12.0, < 12.12.1 |
References
- https://psirt.watchguard.com/CVE-2026-8247Broken Link
Timeline
- Published
- Last Modified
- Status
- Analyzed
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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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