CVE-2026-111107: Null Dereference

Description

A NULL pointer dereference vulnerability in WatchGuard Fireware OS’s management interface allows a remote, unauthenticated attacker with network access to the management interface to crash the management service by sending a specially crafted login request. Repeated exploitation terminates all active administrator sessions and in-progress management operations and can prevent management of the device. Traffic processing is not affected.

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Weakness Type (CWE)

CWE-248 CWE-248

CWE-476 CWE-476

CWE-1286 CWE-1286

References

Other References

https://psirt.watchguard.com/CVE-2026-111107

Frequently Asked Questions

What is CVE-2026-111107? +

A NULL pointer dereference vulnerability in WatchGuard Fireware OS’s management interface allows a remote, unauthenticated attacker with network access to the management interface to crash the management service by sending a specially crafted login request. Repeated exploitation terminates all active administrator sessions and in-progress management operations and can prevent management of the device. Traffic processing is not affected.

How do I check if I'm vulnerable to CVE-2026-111107? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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