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CVE-2026-3343 Details
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.
A reflected cross-site scripting vulnerability has been identified in the Fireware OS Web UI. This vulnerability allows the execution of malicious JavaScript in the browser of an authenticated management user who clicks on a specially crafted link. It affects Fireware OS versions 12.7 prior to 12.11.7 and 2025.1 prior to 2026.1.1.
Metrics
CVSS 4.0 Severity and Vector Strings:
CNA: WatchGuard Technologies, Inc.CVSS-B:5.1 MEDIUMVector: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
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 3, 2026Exploitation: NoneAutomatable: NoTechnical Impact: Partial
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://psirt.watchguard.com/CVE-2026-3343 | WatchGuard Technologies, Inc. | |
| https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00004 | WatchGuard Technologies, Inc. | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | WatchGuard Technologies, Inc. |
Affected Products
| Product | Versions |
|---|---|
| watchguard fireware | >= 12.7, < 12.11.8 >= 2025.1, < 2026.1.2 |
CPE
Remediation
| |
| watchguard firebox m270 | All versions |
CPE
Remediation
| |
| watchguard firebox m290 | All versions |
CPE
Remediation
| |
| watchguard firebox m370 | All versions |
CPE
Remediation
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| watchguard firebox m390 | All versions |
CPE
Remediation
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| watchguard firebox m440 | All versions |
CPE
Remediation
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| watchguard firebox m4600 | All versions |
CPE
Remediation
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| watchguard firebox m470 | All versions |
CPE
Remediation
| |
| watchguard firebox m4800 | All versions |
CPE
Remediation
| |
| watchguard firebox m5600 | All versions |
CPE
Remediation
| |
| watchguard firebox m570 | All versions |
CPE
Remediation
| |
| watchguard firebox m5800 | All versions |
CPE
Remediation
| |
| watchguard firebox m590 | All versions |
CPE
Remediation
| |
| watchguard firebox m670 | All versions |
CPE
Remediation
| |
| watchguard firebox m690 | All versions |
CPE
Remediation
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| watchguard firebox nv5 | All versions |
CPE
Remediation
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| watchguard firebox t20 | All versions |
CPE
Remediation
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| watchguard firebox t25 | All versions |
CPE
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| watchguard firebox t40 | All versions |
CPE
Remediation
| |
| watchguard firebox t45 | All versions |
CPE
Remediation
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| watchguard firebox t55 | All versions |
CPE
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| watchguard firebox t70 | All versions |
CPE
Remediation
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| watchguard firebox t80 | All versions |
CPE
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| watchguard firebox t85 | All versions |
CPE
Remediation
| |
| watchguard fireboxcloud | All versions |
CPE
Remediation
| |
| watchguard fireboxv | All versions |
CPE
Remediation
| |
| watchguard firebox m295 | All versions |
CPE
Remediation
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| watchguard firebox m395 | All versions |
CPE
Remediation
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| watchguard firebox m495 | All versions |
CPE
Remediation
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| watchguard firebox m595 | All versions |
CPE
Remediation
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| watchguard firebox m695 | All versions |
CPE
Remediation
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| watchguard firebox t115-w | All versions |
CPE
Remediation
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| watchguard firebox t125 | All versions |
CPE
Remediation
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| watchguard firebox t125-w | All versions |
CPE
Remediation
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| watchguard firebox t145 | All versions |
CPE
Remediation
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| watchguard firebox t145-w | All versions |
CPE
Remediation
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| watchguard firebox t185 | All versions |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 10, 2026 | CVE Modified | WatchGuard Technologies, Inc. |
| Jun 17, 2026 | CVE Modified | WatchGuard Technologies, Inc. |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 4, 2026 | Initial Analysis | [email protected] |
| Mar 4, 2026 | CVE Modified | WatchGuard Technologies, Inc. |
| Mar 3, 2026 | New CVE Received | WatchGuard Technologies, Inc. |