WatchGuard Firebox Firmware Image Validation Bypass in WatchGuard Fireware OS

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-13722
StatePUBLISHED
AssignerWatchGuard
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-03 00:16:52 UTC
Updated2026-08-14 12:57:58 UTC
DescriptionWatchGuard Fireware OS contains a firmware validation bypass when processing a backup image via the backup/restore feature. An authenticated administrator can exploit this vulnerability to install a tampered firmware image.

Risk And Classification

Primary CVSS: v4.0 8.6 HIGH from 5d1c2695-1a31-4499-88ae-e847036fd7e3

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.002410000 probability, percentile 0.152930000 (date 2026-08-11)

Problem Types: CWE-347 | CWE-347 CWE-347

VersionSourceTypeScoreSeverityVector
4.05d1c2695-1a31-4499-88ae-e847036fd7e3Secondary8.6HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNADECLARED8.6HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
3.1[email protected]Primary7.2HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
High
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Watchguard Firebox M295 - All All All
Hardware Watchguard Firebox M395 - All All All
Hardware Watchguard Firebox M495 - All All All
Hardware Watchguard Firebox M595 - All All All
Hardware Watchguard Firebox M695 - All All All
Hardware Watchguard Firebox T115-w - All All All
Hardware Watchguard Firebox T125 - All All All
Hardware Watchguard Firebox T125-w - All All All
Hardware Watchguard Firebox T145 - All All All
Hardware Watchguard Firebox T145-w - All All All
Hardware Watchguard Firebox T15 - All All All
Hardware Watchguard Firebox T185 - All All All
Hardware Watchguard Firebox T35 - All All All
Operating System Watchguard Fireware All All All All
Operating System Watchguard Fireware All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA WatchGuard Fireware OS affected 2025.1 2026.2.1 custom Default
CNA WatchGuard Fireware OS affected 12.0 12.12.1 custom Default
CNA WatchGuard Fireware OS affected 11.0 11.12.4+541730 custom Default
CNA WatchGuard Fireware OS affected 12.0 * custom T15/T35

References

ReferenceSourceLinkTags
psirt.watchguard.com/CVE-2026-13722 5d1c2695-1a31-4499-88ae-e847036fd7e3 psirt.watchguard.com Broken Link
www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00022 5d1c2695-1a31-4499-88ae-e847036fd7e3 www.watchguard.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Discovered internally by WatchGuard (en)

Additional Advisory Data

Solutions

CNA: Fireware OS 2026.2.1, Fireware OS 12.12.1

Exploits

CNA: WatchGuard is not aware of any exploitation of this vulnerability in the wild.

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