CVE-2025-11838

8.7 highEPSS 0.5%

High (8.7) in watchguard fireware. EPSS 0.5% chance of exploitation in the next 30 days.

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 dynamic gateway peer.

Severity

CVSS 4.0

8.7 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-31)
CWE: CWE-763
Published: 2025-12-04
Modified: 2026-09-25
Record from: the NVD, synced 2026-10-19

Affected

watchguard:fireware

References

https://psirt.watchguard.com/CVE-2025-11838
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00018

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