What is CVE-2026-13084?

CVE-2026-13084 is a high-severity vulnerability in Watchguard Firebox Cloud, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-07-03.

How severe is CVE-2026-13084?

High severity. CVSS v3 base score is 7.5 out of 10.

NULL pointer dereference in Watchguard Firebox Cloud

CVE-2026-13084

A null pointer dereference vulnerability in WatchGuard Fireware OS may allow a remote unauthenticated attacker to create a denial-of-service (DoS) condition by sending specially crafted IKEv2 messages. This vulnerability affects both the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a dynamic gateway peer. This vulnerability affects Fireware OS 11.10.2 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2

Published 2026-07-03 · last modified 2026-08-28.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (47.2th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.001

Affected products

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

5d1c2695-1a31-4499-88ae-e847036fd7e3 (vendor-advisory, Vendor Advisory)
5d1c2695-1a31-4499-88ae-e847036fd7e3 (vendor-advisory, Broken Link)

Frequently asked questions

What is CVE-2026-13084?: CVE-2026-13084 is a high-severity vulnerability in Watchguard Firebox Cloud, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-07-03.
How severe is CVE-2026-13084?: High severity. CVSS v3 base score is 7.5 out of 10.