by Kastro
Paper/Archive/CVE-2026-112709

CVE-2026-112709

WatchGuard Fireware OS — Fireware OS Heap Buffer Overflow in AD Authentication Service Allows Pre-Authentication Remote Code Execution

EPSS 0.4%CVSS 9.2
critical.is priorityof 100
35
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 36.2.362 × 207.2No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Fireware OS2025.1 – < 2026.42026.4CNA
Fireware OS12.0 – < 12.12.412.12.4CNA
Fireware OS12.0 – < 12.5.2212.5.22CNA

Scores by source

WatchGuard (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References

advisorypsirt.watchguard.com/CVE-2026-112709