CVE-2026-86133

Published Sep 30, 2026 CWE-191 CWE-1284

Description

An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon (iked) allows a remote attacker who has completed the initial IKEv2 handshake to crash the iked process by sending a specially crafted encrypted IKEv2 message, resulting in a denial of service.

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Weakness Type (CWE)

CWE-191 CWE-191
CWE-1284 CWE-1284

References

Frequently Asked Questions

What is CVE-2026-86133? +
An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon (iked) allows a remote attacker who has completed the initial IKEv2 handshake to crash the iked process by sending a specially crafted encrypted IKEv2 message, resulting in a denial of service.
How do I check if I'm vulnerable to CVE-2026-86133? +
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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