A reflected cross-site scripting (XSS) vulnerability in the Fireware OS Web UI enabled execution of malicious JavaScript in the context of an authenticated management user's browser when they click on a specially crafted link. This vulnerability affects Fireware OS 12.7 up to and including 12.11.7 and 2025.1 up to and including 2026.1.1.
History

Wed, 04 Mar 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Watchguard firebox M270
Watchguard firebox M290
Watchguard firebox M295
Watchguard firebox M370
Watchguard firebox M390
Watchguard firebox M395
Watchguard firebox M440
Watchguard firebox M4600
Watchguard firebox M470
Watchguard firebox M4800
Watchguard firebox M495
Watchguard firebox M5600
Watchguard firebox M570
Watchguard firebox M5800
Watchguard firebox M590
Watchguard firebox M595
Watchguard firebox M670
Watchguard firebox M690
Watchguard firebox M695
Watchguard firebox Nv5
Watchguard firebox T115-w
Watchguard firebox T125
Watchguard firebox T125-w
Watchguard firebox T145
Watchguard firebox T145-w
Watchguard firebox T185
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
Watchguard fireware
CPEs cpe:2.3:h:watchguard:firebox_m270:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m290:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m295:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m370:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m390:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m395:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m440:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m4600:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m470:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m4800:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m495:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m5600:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m570:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m5800:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m590:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m595:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m670:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m690:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_m695:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_nv5:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_t115-w:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_t125-w:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_t125:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_t145-w:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_t145:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_t185:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_t20:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_t25:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_t40:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_t45:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_t55:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_t70:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_t80:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_t85:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:fireboxcloud:-:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:fireboxv:-:*:*:*:*:*:*:*
cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*
Vendors & Products Watchguard firebox M270
Watchguard firebox M290
Watchguard firebox M295
Watchguard firebox M370
Watchguard firebox M390
Watchguard firebox M395
Watchguard firebox M440
Watchguard firebox M4600
Watchguard firebox M470
Watchguard firebox M4800
Watchguard firebox M495
Watchguard firebox M5600
Watchguard firebox M570
Watchguard firebox M5800
Watchguard firebox M590
Watchguard firebox M595
Watchguard firebox M670
Watchguard firebox M690
Watchguard firebox M695
Watchguard firebox Nv5
Watchguard firebox T115-w
Watchguard firebox T125
Watchguard firebox T125-w
Watchguard firebox T145
Watchguard firebox T145-w
Watchguard firebox T185
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
Watchguard fireware
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}


Wed, 04 Mar 2026 16:30:00 +0000

Type Values Removed Values Added
References

Wed, 04 Mar 2026 15:45:00 +0000

Type Values Removed Values Added
References

Tue, 03 Mar 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 03 Mar 2026 13:45:00 +0000

Type Values Removed Values Added
Description A reflected cross-site scripting (XSS) vulnerability in the Fireware OS Web UI enabled execution of malicious JavaScript in the context of an authenticated management user's browser when they click on a specially crafted link. This vulnerability affects Fireware OS 12.7 up to and including 12.11.7 and 2025.1 up to and including 2026.1.1.
Title WatchGuard Firebox Reflected Cross-Site-Scripting (XSS) Vulnerability in Fireware Web UI
First Time appeared Watchguard
Watchguard fireware Os
Weaknesses CWE-79
CPEs cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:12.7
cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:2025.1
Vendors & Products Watchguard
Watchguard fireware Os
References
Metrics cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: WatchGuard

Published:

Updated: 2026-03-04T15:22:22.283Z

Reserved: 2026-02-27T15:37:10.115Z

Link: CVE-2026-3343

cve-icon Vulnrichment

Updated: 2026-03-03T14:45:31.213Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-03T14:15:57.687

Modified: 2026-03-04T19:34:56.143

Link: CVE-2026-3343

cve-icon Redhat

No data.