CVE-2026-13053: WatchGuard Firebox Authenticated Out of Bounds Write in Management CLI Command Handler
Published Jul 2, 2026
·Updated
An Out-of-bounds Write vulnerability in WatchGuard Fireware OS's CLI could allow an authenticated privileged user to execute arbitrary code via a specially crafted CLI command.
Affected Software
42 affected components
WatchGuard Fireware OS>=11.0<=11.12.4_Update1, >=12.0<=12.12, >=2025.1<=2026.2
All of the following
WatchGuard Fireware>=11.0<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>=11.0<=12.5.18
Any of the following
WatchGuard Firebox T15
WatchGuard Firebox T35
Event History
Jul 2, 2026
CVE Published
via MITRE·11:08 PM
Data Sourced
via MITRE·11:08 PM
RemedyDescriptionWeakness
Jul 3, 2026
Data Sourced
via NVD·12:16 AM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-13053?
CVE-2026-13053 has a high severity rating of 8.6.
2
How do I fix CVE-2026-13053?
To fix CVE-2026-13053, update your WatchGuard Fireware OS to the latest security patch provided by WatchGuard.
3
What systems are affected by CVE-2026-13053?
CVE-2026-13053 affects WatchGuard Fireware OS versions from 11.0 to 11.12.4_Update1, 12.0 to 12.12, and 2025.1.
4
What type of vulnerability is CVE-2026-13053?
CVE-2026-13053 is classified as an Out-of-bounds Write vulnerability.
5
Can CVE-2026-13053 allow unauthorized access?
CVE-2026-13053 requires authenticated privileged user access to exploit, but it can allow execution of arbitrary code.