CVE-2026-86132

An integer underflow vulnerability in the WatchGuard Fireware OS IKEv2 daemon (iked) allows a remote, unauthenticated attacker to crash the process by sending a specially crafted encrypted IKEv2 message negotiated with an AES-GCM cipher suite.

Score

CVSS 4.0 8.2 High

Status

Analyzed - 5d1c2695-1a31-4499-88ae-e847036fd7e3

Published

2026-09-29

Last modified

2026-10-06

Weaknesses

CWE-191

Affected products

• Fireware (Watchguard)
• Fireware Os (Watchguard)

References

• https://psirt.watchguard.com/CVE-2026-86132