Vulnerability details
CVE-2026-78008
WatchGuard Fireware OS
Fireware OS Authenticated Buffer Overflow in wgagent
CVSS 4.0
8.6High
Official description
A buffer overflow vulnerability in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to cause a denial of service (DoS) condition or potentially execute arbitrary code by sending specially crafted network traffic.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.6High | 4.0 | CVEProject cvelistV5 (CNA) (WatchGuard) | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| WatchGuard | Fireware OS | 12.0 ≤ v < 12.12.2 | CVEProject cvelistV5 (CNA) |
| WatchGuard | Fireware OS | 12.0 ≤ v < 12.5.20 | CVEProject cvelistV5 (CNA) |
| WatchGuard | Fireware OS | 2025.0 ≤ v < 2026.2.2 | CVEProject cvelistV5 (CNA) |
| WatchGuard | Fireware OS | 2026.3 ≤ v < 2026.3.1 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://psirt.watchguard.com/CVE-2026-78008 vendor-advisory
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Details
- Published
- 2026-08-28
- Last updated
- 2026-09-04
- State
- Published
- Assigner (CNA)
- WatchGuard
Exploit prediction (EPSS)
0.6%
Probability of exploitation in 30 days
49.1%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-787