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    CVE-2021-20596

    NULL Pointer Dereference in MELSEC-F Series FX3U-ENET firmware version 1.14 and prior, FX3U-ENET-L firmware version 1.14 and prior and FX3U-ENET-P502 firmware version 1.14 and prior allows a remote unauthenticated attacker to cause a DoS condition in communication by sending specially crafted packets. Control by MELSEC-F series PLC is not affected and system reset is required for recovery.

    Published:Jul 22, 2021
    Last Modified:Nov 21, 2024
    EPS:Jul 22, 2021
    EPSS Score:0.00573
    CVSS Score:7.5

    Affected Products

    Vendor
    Mitsubishielectric
    Product
    Fx3u-enet-l Firmware
    Vendor
    Mitsubishielectric
    Product
    Fx3u-enet-p502 Firmware
    Vendor
    Mitsubishielectric
    Product
    Fx3u-enet Firmware

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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