CVE-2026-3343
MEDIUM EPSS 9.5%
Published Mar 3, 20263mo ago · Modified Jun 17, 20261w ago
5.1 CVSS 4.0
Published Mar 3, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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/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 Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction A
Scope X
Threat Intelligence
EPSS Exploit Probability
9.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-79 Cross-site Scripting Injection
Affected Products 38
| Vendor | Product | Version | Range |
|---|---|---|---|
| watchguard | fireware | * | ≥12.7 – <12.11.8 |
| watchguard | firebox_m270 | * | any |
| watchguard | firebox_m290 | * | any |
| watchguard | firebox_m370 | * | any |
| watchguard | firebox_m390 | * | any |
| watchguard | firebox_m440 | * | any |
| watchguard | firebox_m4600 | * | any |
| watchguard | firebox_m470 | * | any |
| watchguard | firebox_m4800 | * | any |
| watchguard | firebox_m5600 | * | any |
| watchguard | firebox_m570 | * | any |
| watchguard | firebox_m5800 | * | any |
| watchguard | firebox_m590 | * | any |
| watchguard | firebox_m670 | * | any |
| watchguard | firebox_m690 | * | any |
| watchguard | firebox_nv5 | * | any |
| watchguard | firebox_t20 | * | any |
| watchguard | firebox_t25 | * | any |
| watchguard | firebox_t40 | * | any |
| watchguard | firebox_t45 | * | any |
| watchguard | firebox_t55 | * | any |
| watchguard | firebox_t70 | * | any |
| watchguard | firebox_t80 | * | any |
| watchguard | firebox_t85 | * | any |
| watchguard | fireboxcloud | * | any |
| watchguard | fireboxv | * | any |
| watchguard | fireware | * | ≥2025.1 – <2026.1.2 |
| watchguard | firebox_m295 | * | any |
| watchguard | firebox_m395 | * | any |
| watchguard | firebox_m495 | * | any |
| watchguard | firebox_m595 | * | any |
| watchguard | firebox_m695 | * | any |
| watchguard | firebox_t115-w | * | any |
| watchguard | firebox_t125 | * | any |
| watchguard | firebox_t125-w | * | any |
| watchguard | firebox_t145 | * | any |
| watchguard | firebox_t145-w | * | any |
| watchguard | firebox_t185 | * | any |
References 1
- watchguard.com https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00004
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.