CVE-2026-86133

HIGHCVSS 8.2/10

Last modified

CVE-2026-86133 is a high-severity vulnerability rated 8.2/10 on the CVSS scale. 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..

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.

Metrics

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
WatchGuardFireware OS>= 2026.3, < 2026.3.2; >= 2025.0, < 2026.2.3; >= 12.0, < 12.12.3
WatchGuardFireware OS>= 12.0, < 12.5.21

References

Timeline

Published
Last Modified
Status
Received

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 severe is CVE-2026-86133?
CVE-2026-86133 has a CVSS score of 8.2/10 (HIGH severity).
How do I fix CVE-2026-86133?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST