CVE-2026-13384: WatchGuard Firebox wgagent Out of Bounds Write Vulnerability

Published Jul 2, 2026
·
Updated

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS wgagent process could allow an authenticated privileged user to execute arbitrary code via a specially crafted requests to the Management Web UI.This vulnerability affects Fireware OS 12.1 up to and including 12.12 and 2025.1 up to and including 2026.2.

Affected Software

42 affected components
WatchGuard Fireware OS>=12.1<=12.12, >=2025.1<=2026.2
All of the following
WatchGuard Fireware>=12.1<12.12.1
Any of the following
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
WatchGuard Firebox M570
WatchGuard Firebox M5800
WatchGuard Firebox M590
WatchGuard Firebox M670
WatchGuard Firebox M690
WatchGuard Firebox Nv5
WatchGuard Firebox T20
WatchGuard Firebox T25
WatchGuard Firebox T40
WatchGuard Firebox T45
WatchGuard Firebox T55
WatchGuard Firebox T70
WatchGuard Firebox T80
WatchGuard Firebox T85
WatchGuard Fireboxcloud
WatchGuard Fireboxv
All of the following
WatchGuard Fireware>=2025.1<2026.2.1
Any of the following
WatchGuard Firebox M295
WatchGuard Firebox M395
WatchGuard Firebox M495
WatchGuard Firebox M595
WatchGuard Firebox M695
WatchGuard Firebox T115-w
WatchGuard Firebox T125
WatchGuard Firebox T125-w
WatchGuard Firebox T145
WatchGuard Firebox T145-w
WatchGuard Firebox T185
All of the following
WatchGuard Fireware>=12.5<=12.5.18
Any of the following
WatchGuard Firebox T15
WatchGuard Firebox T35

Event History

Jul 2, 2026
CVE Published
via MITRE·11:05 PM
Data Sourced
via MITRE·11:05 PM
DescriptionWeakness
Jul 3, 2026
Data Sourced
via NVD·12:16 AM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-13384?

CVE-2026-13384 has a high severity rating of 8.6 according to the CVSS scoring system.

2

How do I fix CVE-2026-13384?

To remediate CVE-2026-13384, update your WatchGuard Fireware OS to the latest version that addresses this out-of-bounds write vulnerability.

3

Who is affected by CVE-2026-13384?

CVE-2026-13384 affects authenticated privileged users of WatchGuard Fireware OS versions 12.1 to 12.12 and 2025.1.

4

What type of vulnerability is CVE-2026-13384?

CVE-2026-13384 is categorized as an Out-of-Bounds Write vulnerability.

5

Can CVE-2026-13384 be exploited remotely?

CVE-2026-13384 can potentially be exploited remotely if an authenticated privileged user sends specially crafted requests to the Management Web UI.

Contact

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