What is CVE-2025-11838?

CVE-2025-11838 is a high-severity vulnerability in Watchguard Fireboxcloud, classified under Release of Invalid Pointer or Reference. CVSS score: 7.5/10. Published 2025-12-04.

How severe is CVE-2025-11838?

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

Vulnerability in Watchguard Fireboxcloud

CVE-2025-11838

A memory corruption vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker to trigger a Denial of Service (DoS) condition in the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a…

EPSS: 0.004 (35.0th percentile) — read the EPSS interpretation.

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.

Affected products

Watchguard Fireboxcloud
Watchguard Firebox_m270
Watchguard Firebox_m290
Watchguard Firebox_m370
Watchguard Firebox_m390
Watchguard Firebox_m440
Watchguard Firebox_m4600
Watchguard Firebox_m470
Watchguard Firebox_m4800
Watchguard Firebox_m5600

Weakness classification (CWE)

CWE-763 — Release of Invalid Pointer or Reference

References

5d1c2695-1a31-4499-88ae-e847036fd7e3 (Vendor Advisory)

Frequently asked questions

What is CVE-2025-11838?: CVE-2025-11838 is a high-severity vulnerability in Watchguard Fireboxcloud, classified under Release of Invalid Pointer or Reference. CVSS score: 7.5/10. Published 2025-12-04.
How severe is CVE-2025-11838?: High severity. CVSS v3 base score is 7.5 out of 10.