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    CVE-2021-20591

    Uncontrolled Resource Consumption vulnerability in Mitsubishi Electric MELSEC iQ-R series CPU modules (R00/01/02CPU all versions, R04/08/16/32/120(EN)CPU all versions, R08/16/32/120SFCPU all versions, R08/16/32/120PCPU all versions, R08/16/32/120PSFCPU all versions) allows a remote unauthenticated attacker to prevent legitimate clients from connecting to the MELSOFT transmission port (TCP/IP) by not closing a connection properly, which may lead to a denial of service (DoS) condition.

    Published:Jun 11, 2021
    Last Modified:Nov 21, 2024
    EPS:Jun 11, 2021
    EPSS Score:0.00496
    CVSS Score:7.5

    Affected Products

    Vendor
    Mitsubishielectric
    Product
    R00cpu
    Vendor
    Mitsubishielectric
    Product
    R00cpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R01cpu
    Vendor
    Mitsubishielectric
    Product
    R01cpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R02cpu
    Vendor
    Mitsubishielectric
    Product
    R02cpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R04cpu
    Vendor
    Mitsubishielectric
    Product
    R04cpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R08cpu
    Vendor
    Mitsubishielectric
    Product
    R08cpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R08pcpu
    Vendor
    Mitsubishielectric
    Product
    R08pcpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R08psfcpu
    Vendor
    Mitsubishielectric
    Product
    R08psfcpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R08sfcpu
    Vendor
    Mitsubishielectric
    Product
    R08sfcpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R120cpu
    Vendor
    Mitsubishielectric
    Product
    R120cpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R120pcpu
    Vendor
    Mitsubishielectric
    Product
    R120pcpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R120psfcpu
    Vendor
    Mitsubishielectric
    Product
    R120psfcpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R120sfcpu
    Vendor
    Mitsubishielectric
    Product
    R120sfcpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R16cpu
    Vendor
    Mitsubishielectric
    Product
    R16cpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R16pcpu
    Vendor
    Mitsubishielectric
    Product
    R16pcpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R16psfcpu
    Vendor
    Mitsubishielectric
    Product
    R16psfcpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R16sfcpu
    Vendor
    Mitsubishielectric
    Product
    R16sfcpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R32cpu
    Vendor
    Mitsubishielectric
    Product
    R32cpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R32pcpu
    Vendor
    Mitsubishielectric
    Product
    R32pcpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R32psfcpu
    Vendor
    Mitsubishielectric
    Product
    R32psfcpu Firmware
    Vendor
    Mitsubishielectric
    Product
    R32sfcpu
    Vendor
    Mitsubishielectric
    Product
    R32sfcpu Firmware

    Exploits

    No exploit reference

    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