Answer in brief
CVE-2026-3343 records a Medium severity (CVSS 6.1) vulnerability in WatchGuard Firebox Reflected Cross-Site-Scripting (XSS) Vulnerability in Fireware Web UI. The current sources do not mark it as known exploited. The current feed maps WatchGuard/Fireware OS (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps WatchGuard/Fireware OS (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:h:watchguard:fireboxcloud:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m270:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m290:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m295:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m370:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m390:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m395:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m440:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m4600:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m470:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m4800:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m495:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m5600:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m570:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m5800:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m590:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m595:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m670:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m690:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_m695:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_nv5:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_t115-w:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_t125:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_t125-w:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_t145:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_t145-w:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_t185:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_t20:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_t25:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_t40:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_t45:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_t55:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_t70:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_t80:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:firebox_t85:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:watchguard:fireboxv:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| WatchGuard/Fireware OSgeneric | >=2025.1 <2026.1.2 || >=12.7 <12.11.8 | 2026.1.2, 12.11.8 |
Published upstream
Mar 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
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.
Quoted source text, attributed separately from HOL analysis.