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    CVE-2021-27239

    This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6400 and R6700 firmware version 1.0.4.98 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the upnpd service, which listens on UDP port 1900 by default. A crafted MX header field in an SSDP message can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11851.

    Published:Mar 29, 2021
    Last Modified:Nov 21, 2024
    EPS:Mar 29, 2021
    EPSS Score:0.02592
    CVSS Score:8.8

    Affected Products

    Vendor
    Netgear
    Product
    D6220
    Vendor
    Netgear
    Product
    D6220 Firmware
    Vendor
    Netgear
    Product
    D6400
    Vendor
    Netgear
    Product
    D6400 Firmware
    Vendor
    Netgear
    Product
    D7000
    Vendor
    Netgear
    Product
    D7000 Firmware
    Vendor
    Netgear
    Product
    D8500
    Vendor
    Netgear
    Product
    D8500 Firmware
    Vendor
    Netgear
    Product
    Dc112a
    Vendor
    Netgear
    Product
    Dc112a Firmware
    Vendor
    Netgear
    Product
    Ex7000
    Vendor
    Netgear
    Product
    Ex7000 Firmware
    Vendor
    Netgear
    Product
    Ex7500
    Vendor
    Netgear
    Product
    Ex7500 Firmware
    Vendor
    Netgear
    Product
    R6250
    Vendor
    Netgear
    Product
    R6250 Firmware
    Vendor
    Netgear
    Product
    R6300
    Vendor
    Netgear
    Product
    R6300 Firmware
    Vendor
    Netgear
    Product
    R6400
    Vendor
    Netgear
    Product
    R6400 Firmware
    Vendor
    Netgear
    Product
    R6700
    Vendor
    Netgear
    Product
    R6700 Firmware
    Vendor
    Netgear
    Product
    R6900p
    Vendor
    Netgear
    Product
    R6900p Firmware
    Vendor
    Netgear
    Product
    R7000
    Vendor
    Netgear
    Product
    R7000 Firmware
    Vendor
    Netgear
    Product
    R7000p
    Vendor
    Netgear
    Product
    R7000p Firmware
    Vendor
    Netgear
    Product
    R7100lg
    Vendor
    Netgear
    Product
    R7100lg Firmware
    Vendor
    Netgear
    Product
    R7850
    Vendor
    Netgear
    Product
    R7850 Firmware
    Vendor
    Netgear
    Product
    R7900
    Vendor
    Netgear
    Product
    R7900 Firmware
    Vendor
    Netgear
    Product
    R7900p
    Vendor
    Netgear
    Product
    R7900p Firmware
    Vendor
    Netgear
    Product
    R7960p
    Vendor
    Netgear
    Product
    R7960p Firmware
    Vendor
    Netgear
    Product
    R8000
    Vendor
    Netgear
    Product
    R8000 Firmware
    Vendor
    Netgear
    Product
    R8000p
    Vendor
    Netgear
    Product
    R8000p Firmware
    Vendor
    Netgear
    Product
    R8300
    Vendor
    Netgear
    Product
    R8300 Firmware
    Vendor
    Netgear
    Product
    R8500
    Vendor
    Netgear
    Product
    R8500 Firmware
    Vendor
    Netgear
    Product
    Rax200
    Vendor
    Netgear
    Product
    Rax200 Firmware
    Vendor
    Netgear
    Product
    Rax75
    Vendor
    Netgear
    Product
    Rax75 Firmware
    Vendor
    Netgear
    Product
    Rax80
    Vendor
    Netgear
    Product
    Rax80 Firmware
    Vendor
    Netgear
    Product
    Rbr750
    Vendor
    Netgear
    Product
    Rbr750 Firmware
    Vendor
    Netgear
    Product
    Rbr850
    Vendor
    Netgear
    Product
    Rbr850 Firmware
    Vendor
    Netgear
    Product
    Rbs40v
    Vendor
    Netgear
    Product
    Rbs40v Firmware
    Vendor
    Netgear
    Product
    Rbs750
    Vendor
    Netgear
    Product
    Rbs750 Firmware
    Vendor
    Netgear
    Product
    Rbs850
    Vendor
    Netgear
    Product
    Rbs850 Firmware
    Vendor
    Netgear
    Product
    Rs400
    Vendor
    Netgear
    Product
    Rs400 Firmware
    Vendor
    Netgear
    Product
    Wndr3400
    Vendor
    Netgear
    Product
    Wndr3400 Firmware
    Vendor
    Netgear
    Product
    Wnr3500l
    Vendor
    Netgear
    Product
    Wnr3500l Firmware
    Vendor
    Netgear
    Product
    Xr300
    Vendor
    Netgear
    Product
    Xr300 Firmware

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-121 Stack-based Buffer Overflow

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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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