NVD

CVE-2026-13371 Detail

Description

An authenticated administrator can trigger a denial-of-service condition in the Fireware Management Web UI by sending malformed or crafted data to the put_data endpoint, which performs unsafe deserialization of the attacker-supplied input.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

Nist CVSS score does not match with CNA score

CNA: WatchGuard Technologies, Inc.

CVSS-B 6.9 MEDIUM

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 4.9 MEDIUM

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

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://psirt.watchguard.com/CVE-2026-13371	WatchGuard Technologies, Inc.	Broken Link
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00014	WatchGuard Technologies, Inc.	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-502	Deserialization of Untrusted Data	WatchGuard Technologies, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

4 change records found show changes

Initial Analysis by NIST 8/14/2026 9:00:12 AM

Action	Type	New Value
Added	CVSS V3.1	AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Added	CPE Configuration	AND OR cpe:2.3:o:watchguard:fireware::::::::* versions from (including) 12.0 up to (excluding) 12.12.1 OR cpe:2.3:h:watchguard:firebox_t55:-:::::::* cpe:2.3:h:watchguard:firebox_t70:-:::::::* cpe:2.3:h:watchguard:firebox_t20:-:::::::* cpe:2.3:h:watchguard:firebox_t40:-:::::::* cpe:2.3:h:watchguard:firebox_t80:-:::::::* cpe:2.3:h:watchguard:firebox_m440:-:::::::* cpe:2.3:h:watchguard:firebox_m270:-:::::::* cpe:2.3:h:watchguard:firebox_m370:-:::::::* cpe:2.3:h:watchguard:firebox_m470:-:::::::* cpe:2.3:h:watchguard:firebox_m570:-:::::::* cpe:2.3:h:watchguard:firebox_m670:-:::::::* cpe:2.3:h:watchguard:firebox_m290:-:::::::* cpe:2.3:h:watchguard:firebox_m390:-:::::::* cpe:2.3:h:watchguard:firebox_m590:-:::::::* cpe:2.3:h:watchguard:firebox_m690:-:::::::* cpe:2.3:h:watchguard:firebox_m4800:-:::::::* cpe:2.3:h:watchguard:firebox_m5800:-:::::::* cpe:2.3:h:watchguard:fireboxv:-:::::::* cpe:2.3:h:watchguard:firebox_m4600:-:::::::* cpe:2.3:h:watchguard:firebox_m5600:-:::::::* cpe:2.3:h:watchguard:firebox_nv5:-:::::::* cpe:2.3:h:watchguard:firebox_t25:-:::::::* cpe:2.3:h:watchguard:firebox_t45:-:::::::* cpe:2.3:h:watchguard:firebox_t85:-:::::::* cpe:2.3:a:watchguard:firebox_cloud:-:::::::*
Added	CPE Configuration	AND OR cpe:2.3:o:watchguard:fireware::::::::* versions from (including) 12.5 up to (excluding) 12.5.19 OR cpe:2.3:h:watchguard:firebox_t15:-:::::::* cpe:2.3:h:watchguard:firebox_t35:-:::::::*
Added	CPE Configuration	AND OR cpe:2.3:o:watchguard:fireware::::::::* versions from (including) 2025.1 up to (excluding) 2026.2.1 OR cpe:2.3:h:watchguard:firebox_t115-w:-:::::::* cpe:2.3:h:watchguard:firebox_t125:-:::::::* cpe:2.3:h:watchguard:firebox_t125-w:-:::::::* cpe:2.3:h:watchguard:firebox_t145:-:::::::* cpe:2.3:h:watchguard:firebox_t145-w:-:::::::* cpe:2.3:h:watchguard:firebox_t185:-:::::::* cpe:2.3:h:watchguard:firebox_m295:-:::::::* cpe:2.3:h:watchguard:firebox_m395:-:::::::* cpe:2.3:h:watchguard:firebox_m495:-:::::::* cpe:2.3:h:watchguard:firebox_m595:-:::::::* cpe:2.3:h:watchguard:firebox_m695:-:::::::*
Added	Reference Type	WatchGuard Technologies, Inc.: https://psirt.watchguard.com/CVE-2026-13371 Types: Broken Link
Added	Reference Type	WatchGuard Technologies, Inc.: https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00014 Types: Vendor Advisory

CVE Modified by WatchGuard Technologies, Inc. 8/10/2026 1:17:29 PM

Action

Type

Old Value

New Value

Added

Reference

https://psirt.watchguard.com/CVE-2026-13371

Changed

Affected

[{"vendor":"WatchGuard","product":"Fireware OS","defaultStatus":"unaffected","versions":[{"version":"12.0","lessThanOrEqual":"12.12","versionType":"semver","status":"affected"},{"version":"12.5","lessThanOrEqual":"12.5.18","versionType":"semver","status":"affected"},{"version":"2025.1","lessThanOrEqual":"2026.2","versionType":"semver","status":"affected"}]}]

[{"vendor":"WatchGuard","product":"Fireware OS","defaultStatus":"unaffected","platforms":["Default"],"versions":[{"version":"2025.1","lessThan":"2026.2.1","versionType":"custom","status":"affected"},{"version":"12.0","lessThan":"12.12.1","versionType":"custom","status":"affected"}]},{"vendor":"WatchGuard","product":"Fireware OS","defaultStatus":"unaffected","platforms":["T15/T35"],"versions":[{"version":"12.0","lessThan":"12.5.19","versionType":"custom","status":"affected"}]}]

New CVE Received from WatchGuard Technologies, Inc. 7/02/2026 8:16:51 PM

Action	Type	New Value
Added	Description	An authenticated administrator can trigger a denial-of-service condition in the Fireware Management Web UI by sending malformed or crafted data to the put_data endpoint, which performs unsafe deserialization of the attacker-supplied input.
Added	CVSS V4.0	AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/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
Added	CWE	CWE-502
Added	Reference	https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00014
Added	Affected	[{"vendor":"WatchGuard","product":"Fireware OS","defaultStatus":"unaffected","versions":[{"version":"12.0","lessThanOrEqual":"12.12","versionType":"semver","status":"affected"},{"version":"12.5","lessThanOrEqual":"12.5.18","versionType":"semver","status":"affected"},{"version":"2025.1","lessThanOrEqual":"2026.2","versionType":"semver","status":"affected"}]}]

Quick Info

CVE Dictionary Entry:
CVE-2026-13371
NVD Published Date:
07/02/2026
NVD Last Modified:
08/14/2026
Source:
WatchGuard Technologies, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2026-13371 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

Initial Analysis by NIST 8/14/2026 9:00:12 AM

CVE Modified by WatchGuard Technologies, Inc. 8/10/2026 1:17:29 PM

CVE Modified by CISA-ADP 7/07/2026 2:16:34 PM

New CVE Received from WatchGuard Technologies, Inc. 7/02/2026 8:16:51 PM

Quick Info