CVE-2025-11838

Q: How do I fix CVE-2025-11838?

Upgrade fireware to 12.11.5 or later.

Q: Is CVE-2025-11838 being actively exploited?

Not that we know of. CVE-2025-11838 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.46% is the estimated probability that it will be exploited in the next 30 days. That is higher than 37% of all scored CVEs.

Q: How severe is CVE-2025-11838?

CVE-2025-11838 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2025-11838 affect?

Published advisories record a fix for fireware (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGH

7.5

CVSS v3

NVD

Description

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.

CWE-763

How to fix

Remediation Available

firewareNVD

Affected:>= 12.0.0, < 12.11.5Fixed in:12.11.5CVE-2025-11838derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.46%probability of exploitation in 30 days

37thpercentile

Low risk: more likely to be exploited than 37% of all known CVEs.

References

Vendor Advisory1

watchguard.com

Other references1

psirt.watchguard.com

Related Vulnerabilities

Other CWE-763 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2007-4367	High	9.3	8.2%	-	Fix
CVE-2015-2695	Medium	5.0	6.2%	-	Fix
CVE-2013-4695	High	7.8	5.3%	-	-
CVE-2020-36224	High	7.5	4.3%	-	Fix
CVE-2022-31625	High	8.1	3.4%	-	Fix
CVE-2021-42377	Critical	9.8	3.4%	-	Fix

Common questions

How do I fix CVE-2025-11838?

Upgrade fireware to 12.11.5 or later.

Is CVE-2025-11838 being actively exploited?

Not that we know of. CVE-2025-11838 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.46% is the estimated probability that it will be exploited in the next 30 days. That is higher than 37% of all scored CVEs.

How severe is CVE-2025-11838?

CVE-2025-11838 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2025-11838 affect?

Published advisories record a fix for fireware (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2025-11838

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-10.