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9.2
CVE-2026-112710: WatchGuard Fireware OS could let attackers run code
CVE-2026-112710 · published today
Summary
The authentication component of WatchGuard Fireware OS that talks to an Active Directory server can be tricked by a specially crafted response. An attacker who can see or modify that traffic could crash the system or run their own code on it. Apply the latest software updates and ensure network traffic to the AD server is protected and monitored.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| watchguard | fireware os |
< 2026.4 < 12.5.22 |
Original advisory text
Fireware OS Heap Buffer Overflow in AD Authentication Service Allows Pre-Authentication Remote Code Execution
A heap-based buffer overflow vulnerability exists 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.
References
- https://psirt.watchguard.com/CVE-2026-112710 vendor-advisory
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker full control (estimated)
Type
CWE-122Heap-based Buffer Overflow
CWE-131Incorrect Calculation of Buffer Size
Timeline
Published27 Oct 2026
Updated27 Oct 2026
First seen27 Oct 2026
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