CVE-2026-8247
EUVD-2026-4145903.07.2026, 00:16
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.
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| watchguard | fireware | 11.0.0 ≤ 𝑥 < 11.12.4 |
| watchguard | fireware | 11.12.4 |
| watchguard | fireware | 11.12.4:u1 |
| watchguard | fireware | 12.5 ≤ 𝑥 < 12.5.19 |
| watchguard | fireware | 2025.1 ≤ 𝑥 < 2026.2.1 |
| watchguard | fireware | 12.0 ≤ 𝑥 < 12.12.1 |
𝑥
= Vulnerable software versions
Common Weakness Enumeration
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The program copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.
- CWE-787 - Out-of-bounds WriteThe software writes data past the end, or before the beginning, of the intended buffer.