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    CVE-2025-6599

    An uncontrolled resource consumption vulnerability in the web server of Zyxel DX3301-T0 firmware version 5.50(ABVY.6.3)C0 and earlier could allow an attacker to perform Slowloris‑style denial‑of‑service (DoS) attacks. Such attacks may temporarily block legitimate HTTP requests and partially disrupt access to the web management interface, while other networking services remain unaffected.

    Published:Nov 18, 2025
    Last Modified:Dec 16, 2025
    EPS:Nov 18, 2025
    EPSS Score:0.00051
    CVSS Score:5.3

    Affected Products

    Vendor
    Zyxel
    Product
    Ax7501-b0
    Vendor
    Zyxel
    Product
    Ax7501-b0 Firmware
    Vendor
    Zyxel
    Product
    Ax7501-b1
    Vendor
    Zyxel
    Product
    Ax7501-b1 Firmware
    Vendor
    Zyxel
    Product
    Dm4200-b0
    Vendor
    Zyxel
    Product
    Dm4200-b0 Firmware
    Vendor
    Zyxel
    Product
    Dx3300-t0
    Vendor
    Zyxel
    Product
    Dx3300-t0 Firmware
    Vendor
    Zyxel
    Product
    Dx3300-t1
    Vendor
    Zyxel
    Product
    Dx3300-t1 Firmware
    Vendor
    Zyxel
    Product
    Dx3301-t0
    Vendor
    Zyxel
    Product
    Dx3301-t0 Firmware
    Vendor
    Zyxel
    Product
    Dx4510-b1
    Vendor
    Zyxel
    Product
    Dx4510-b1 Firmware
    Vendor
    Zyxel
    Product
    Dx5401-b0
    Vendor
    Zyxel
    Product
    Dx5401-b0 Firmware
    Vendor
    Zyxel
    Product
    Dx5401-b1
    Vendor
    Zyxel
    Product
    Dx5401-b1 Firmware
    Vendor
    Zyxel
    Product
    Ee3301-00
    Vendor
    Zyxel
    Product
    Ee3301-00 Firmware
    Vendor
    Zyxel
    Product
    Ee5301-00
    Vendor
    Zyxel
    Product
    Ee5301-00 Firmware
    Vendor
    Zyxel
    Product
    Ee6510-10
    Vendor
    Zyxel
    Product
    Ee6510-10 Firmware
    Vendor
    Zyxel
    Product
    Emg3525-t50b
    Vendor
    Zyxel
    Product
    Emg3525-t50b Firmware
    Vendor
    Zyxel
    Product
    Emg5523-t50b
    Vendor
    Zyxel
    Product
    Emg5523-t50b Firmware
    Vendor
    Zyxel
    Product
    Emg5723-t50k
    Vendor
    Zyxel
    Product
    Emg5723-t50k Firmware
    Vendor
    Zyxel
    Product
    Emg6726-b10a
    Vendor
    Zyxel
    Product
    Emg6726-b10a Firmware
    Vendor
    Zyxel
    Product
    Ex3300-t0
    Vendor
    Zyxel
    Product
    Ex3300-t0 Firmware
    Vendor
    Zyxel
    Product
    Ex3300-t1
    Vendor
    Zyxel
    Product
    Ex3300-t1 Firmware
    Vendor
    Zyxel
    Product
    Ex3301-t0
    Vendor
    Zyxel
    Product
    Ex3301-t0 Firmware
    Vendor
    Zyxel
    Product
    Ex3500-t0
    Vendor
    Zyxel
    Product
    Ex3500-t0 Firmware
    Vendor
    Zyxel
    Product
    Ex3501-t0
    Vendor
    Zyxel
    Product
    Ex3501-t0 Firmware
    Vendor
    Zyxel
    Product
    Ex3600-t0
    Vendor
    Zyxel
    Product
    Ex3600-t0 Firmware
    Vendor
    Zyxel
    Product
    Ex5401-b0
    Vendor
    Zyxel
    Product
    Ex5401-b0 Firmware
    Vendor
    Zyxel
    Product
    Ex5401-b1
    Vendor
    Zyxel
    Product
    Ex5401-b1 Firmware
    Vendor
    Zyxel
    Product
    Ex5501-b0
    Vendor
    Zyxel
    Product
    Ex5501-b0 Firmware
    Vendor
    Zyxel
    Product
    Ex5510-b0
    Vendor
    Zyxel
    Product
    Ex5510-b0 Firmware
    Vendor
    Zyxel
    Product
    Ex5512-t0
    Vendor
    Zyxel
    Product
    Ex5512-t0 Firmware
    Vendor
    Zyxel
    Product
    Ex5601-t0
    Vendor
    Zyxel
    Product
    Ex5601-t0 Firmware
    Vendor
    Zyxel
    Product
    Ex5601-t1
    Vendor
    Zyxel
    Product
    Ex5601-t1 Firmware
    Vendor
    Zyxel
    Product
    Ex7501-b0
    Vendor
    Zyxel
    Product
    Ex7501-b0 Firmware
    Vendor
    Zyxel
    Product
    Ex7710-b0
    Vendor
    Zyxel
    Product
    Ex7710-b0 Firmware
    Vendor
    Zyxel
    Product
    Gm4100-b0
    Vendor
    Zyxel
    Product
    Gm4100-b0 Firmware
    Vendor
    Zyxel
    Product
    Lte3301-plus
    Vendor
    Zyxel
    Product
    Lte3301-plus Firmware
    Vendor
    Zyxel
    Product
    Nebula Fwa505
    Vendor
    Zyxel
    Product
    Nebula Fwa505 Firmware
    Vendor
    Zyxel
    Product
    Nebula Fwa510
    Vendor
    Zyxel
    Product
    Nebula Fwa510 Firmware
    Vendor
    Zyxel
    Product
    Nebula Fwa515
    Vendor
    Zyxel
    Product
    Nebula Fwa515 Firmware
    Vendor
    Zyxel
    Product
    Nebula Fwa710
    Vendor
    Zyxel
    Product
    Nebula Fwa710 Firmware
    Vendor
    Zyxel
    Product
    Nr5103
    Vendor
    Zyxel
    Product
    Nr5103 Firmware
    Vendor
    Zyxel
    Product
    Nr5103e
    Vendor
    Zyxel
    Product
    Nr5103e Firmware
    Vendor
    Zyxel
    Product
    Nr5309
    Vendor
    Zyxel
    Product
    Nr5309 Firmware
    Vendor
    Zyxel
    Product
    Nr7302
    Vendor
    Zyxel
    Product
    Nr7302 Firmware
    Vendor
    Zyxel
    Product
    Nr7303
    Vendor
    Zyxel
    Product
    Nr7303 Firmware
    Vendor
    Zyxel
    Product
    Pe3301-00
    Vendor
    Zyxel
    Product
    Pe3301-00 Firmware
    Vendor
    Zyxel
    Product
    Pe5301-01
    Vendor
    Zyxel
    Product
    Pe5301-01 Firmware
    Vendor
    Zyxel
    Product
    Pm3100-t0
    Vendor
    Zyxel
    Product
    Pm3100-t0 Firmware
    Vendor
    Zyxel
    Product
    Pm5100-t0
    Vendor
    Zyxel
    Product
    Pm5100-t0 Firmware
    Vendor
    Zyxel
    Product
    Pm7300-t0
    Vendor
    Zyxel
    Product
    Pm7300-t0 Firmware
    Vendor
    Zyxel
    Product
    Pm7500-00
    Vendor
    Zyxel
    Product
    Pm7500-00 Firmware
    Vendor
    Zyxel
    Product
    Px3321-t1
    Vendor
    Zyxel
    Product
    Px3321-t1 Firmware
    Vendor
    Zyxel
    Product
    Px5301-t0
    Vendor
    Zyxel
    Product
    Px5301-t0 Firmware
    Vendor
    Zyxel
    Product
    Scr 50axe
    Vendor
    Zyxel
    Product
    Scr 50axe Firmware
    Vendor
    Zyxel
    Product
    Vmg3625-t50b
    Vendor
    Zyxel
    Product
    Vmg3625-t50b Firmware
    Vendor
    Zyxel
    Product
    Vmg3927-b50b
    Vendor
    Zyxel
    Product
    Vmg3927-b50b Firmware
    Vendor
    Zyxel
    Product
    Vmg3927-t50k
    Vendor
    Zyxel
    Product
    Vmg3927-t50k Firmware
    Vendor
    Zyxel
    Product
    Vmg4005-b50a
    Vendor
    Zyxel
    Product
    Vmg4005-b50a Firmware
    Vendor
    Zyxel
    Product
    Vmg4005-b50b
    Vendor
    Zyxel
    Product
    Vmg4005-b50b Firmware
    Vendor
    Zyxel
    Product
    Vmg4005-b60a
    Vendor
    Zyxel
    Product
    Vmg4005-b60a Firmware
    Vendor
    Zyxel
    Product
    Vmg4927-b50a
    Vendor
    Zyxel
    Product
    Vmg4927-b50a Firmware
    Vendor
    Zyxel
    Product
    Vmg8623-t50b
    Vendor
    Zyxel
    Product
    Vmg8623-t50b Firmware
    Vendor
    Zyxel
    Product
    Vmg8825-t50k
    Vendor
    Zyxel
    Product
    Vmg8825-t50k Firmware
    Vendor
    Zyxel
    Product
    We3300-00
    Vendor
    Zyxel
    Product
    We3300-00 Firmware
    Vendor
    Zyxel
    Product
    Wx3100-t0
    Vendor
    Zyxel
    Product
    Wx3100-t0 Firmware
    Vendor
    Zyxel
    Product
    Wx3401-b0
    Vendor
    Zyxel
    Product
    Wx3401-b0 Firmware
    Vendor
    Zyxel
    Product
    Wx3401-b1
    Vendor
    Zyxel
    Product
    Wx3401-b1 Firmware
    Vendor
    Zyxel
    Product
    Wx5600-t0
    Vendor
    Zyxel
    Product
    Wx5600-t0 Firmware
    Vendor
    Zyxel
    Product
    Wx5610-b0
    Vendor
    Zyxel
    Product
    Wx5610-b0 Firmware

    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