CVE-2026-13368: WatchGuard Fireware OS contains a race condition leading to a use-after-free vulnerability in LDAP authenticat

Q: How do I fix CVE-2026-13368?

fireware: upgrade to 11.12.4, 12.5.19, 12.12.1, 2026.2.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-13368 being exploited?

CVE-2026-13368 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-13368 affect?

CVE-2026-13368 affects fireware. Severity is high (CVSS 8.1). WatchGuard Fireware OS contains a race condition leading to a use-after-free vulnerability in LDAP authentication for the Mobile User VPN with IKEv2. A remote unauthenticated attacker could exploit this vulnerability to execute arbitrary co

Q: How urgent is CVE-2026-13368?

Priority 48/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 8.1REMOTEUPGRADE

CVE-2026-13368 is a high-severity flaw (CVSS 8.1) affecting fireware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WatchGuard Fireware OS contains a race condition leading to a use-after-free vulnerability in LDAP authentication for the Mobile User VPN with IKEv2. A remote unauthenticated attacker could exploit this vulnerability to execute arbitrary code in the context of the iked process on Fireboxes that have a Mobile VPN with IKEv2 configured to use an external LDAP authentication server.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-416
Published	2026-07-03
Last modified	2026-10-25

Publisher (CNA): WatchGuard Technologies, Inc. · Vendor: watchguard

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-03 00:16 UTCPublished CVE record published
2026-10-25 21:10 UTCUpdated Record last modified

watchguard fireware UPGRADE

Affected: >= 2025.1 and < 2026.2.1 · >= 12.5 and < 12.5.19 · >= 11.0.0 and < 11.12.4 · 11.12.4 · 11.12.4 u1 · >= 12.0 and < 12.12.1

Fixed in: 11.12.4, 12.5.19, 12.12.1, 2026.2.1

Safe to downgrade to: a release before 11.0.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-13368?

fireware: upgrade to 11.12.4, 12.5.19, 12.12.1, 2026.2.1. Exact commands for each OS are on this page.

Is CVE-2026-13368 being exploited?

CVE-2026-13368 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-13368 affect?

CVE-2026-13368 affects fireware. Severity is high (CVSS 8.1). WatchGuard Fireware OS contains a race condition leading to a use-after-free vulnerability in LDAP authentication for the Mobile User VPN with IKEv2. A remote unauthenticated attacker could exploit this vulnerability to execute arbitrary co

How urgent is CVE-2026-13368?

Priority 48/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-13084 HIGH 7.5 UPGRADE A null pointer dereference vulnerability in WatchGuard Fireware OS may allow a remote unauthenticated attacker
CVE-2026-13383 HIGH 7.2 UPGRADE An Out-of-bounds Write vulnerability in WatchGuard Fireware OS ikestubd process could allow an authenticated p
CVE-2026-13384 HIGH 7.2 UPGRADE An Out-of-bounds Write vulnerability in WatchGuard Fireware OS wgagent process could allow an authenticated pr
CVE-2026-8247 HIGH 8.8 UPGRADE An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker on the sa
CVE-2026-13050 HIGH 7.2 UPGRADE An Out-of-bounds Write vulnerability in WatchGuard Fireware OS networkd process could allow an authenticated p

References

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