Vulnerability details
CVE-2026-112709
WatchGuard Fireware OS
Fireware OS Heap Buffer Overflow in AD Authentication Service Allows Pre-Authentication Remote Code Execution
CVSS 4.0
9.2Critical
Official description
A heap-based buffer overflow vulnerability in the Fireware OS authentication service allows an attacker who controls or intercepts traffic to the configured Active Directory server to create a denial of service condition and potentially execute arbitrary code by returning a specially crafted response.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.2Critical | 4.0 | CVEProject cvelistV5 (CNA) (WatchGuard) | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/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 < 12.12.4 | CVEProject cvelistV5 (CNA) |
| WatchGuard | Fireware OS | 12.0 ≤ v < 12.5.22 | CVEProject cvelistV5 (CNA) |
| WatchGuard | Fireware OS | 2025.1 ≤ v < 2026.4 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://psirt.watchguard.com/CVE-2026-112709 vendor-advisory
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Details
- Published
- 2026-10-27
- Last updated
- 2026-11-04
- State
- Published
- Assigner (CNA)
- WatchGuard
- Kolun priority
- 23 · Low
Exploit prediction (EPSS)
0.41%
Probability of exploitation in 30 days
36.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-122
- CWE-131
- CWE-787