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    CVE-2026-3343

    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.

    Published:Mar 3, 2026
    Last Modified:Aug 10, 2026
    EPS:Mar 3, 2026
    EPSS Score:0.00196
    CVSS Score:6.1

    Affected Products

    Vendor
    Watchguard
    Product
    Firebox M270
    Vendor
    Watchguard
    Product
    Firebox M290
    Vendor
    Watchguard
    Product
    Firebox M295
    Vendor
    Watchguard
    Product
    Firebox M370
    Vendor
    Watchguard
    Product
    Firebox M390
    Vendor
    Watchguard
    Product
    Firebox M395
    Vendor
    Watchguard
    Product
    Firebox M440
    Vendor
    Watchguard
    Product
    Firebox M4600
    Vendor
    Watchguard
    Product
    Firebox M470
    Vendor
    Watchguard
    Product
    Firebox M4800
    Vendor
    Watchguard
    Product
    Firebox M495
    Vendor
    Watchguard
    Product
    Firebox M5600
    Vendor
    Watchguard
    Product
    Firebox M570
    Vendor
    Watchguard
    Product
    Firebox M5800
    Vendor
    Watchguard
    Product
    Firebox M590
    Vendor
    Watchguard
    Product
    Firebox M595
    Vendor
    Watchguard
    Product
    Firebox M670
    Vendor
    Watchguard
    Product
    Firebox M690
    Vendor
    Watchguard
    Product
    Firebox M695
    Vendor
    Watchguard
    Product
    Firebox Nv5
    Vendor
    Watchguard
    Product
    Firebox T115-w
    Vendor
    Watchguard
    Product
    Firebox T125
    Vendor
    Watchguard
    Product
    Firebox T125-w
    Vendor
    Watchguard
    Product
    Firebox T145
    Vendor
    Watchguard
    Product
    Firebox T145-w
    Vendor
    Watchguard
    Product
    Firebox T185
    Vendor
    Watchguard
    Product
    Firebox T20
    Vendor
    Watchguard
    Product
    Firebox T25
    Vendor
    Watchguard
    Product
    Firebox T40
    Vendor
    Watchguard
    Product
    Firebox T45
    Vendor
    Watchguard
    Product
    Firebox T55
    Vendor
    Watchguard
    Product
    Firebox T70
    Vendor
    Watchguard
    Product
    Firebox T80
    Vendor
    Watchguard
    Product
    Firebox T85
    Vendor
    Watchguard
    Product
    Fireboxcloud
    Vendor
    Watchguard
    Product
    Fireboxv
    Vendor
    Watchguard
    Product
    Fireware
    Vendor
    Watchguard
    Product
    Fireware Os

    Exploits

    No exploit reference

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High