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    CVE-2021-21958

    A heap-based buffer overflow vulnerability exists in the Hword HwordApp.dll functionality of Hancom Office 2020 11.0.0.2353. A specially-crafted malformed file can lead to memory corruption and potential arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.

    Published:Feb 16, 2022
    Last Modified:Apr 15, 2025
    EPS:Feb 16, 2022
    EPSS Score:0.00827
    CVSS Score:7.8

    Affected Products

    Vendor
    Hancom
    Product
    Hancom Office 2020

    Exploits

    https://talosintelligence.com/vulnerability_reports/TALOS-2021-1386https://blog.talosintelligence.com/2022/02/vuln-spotlight-.htmlhttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1386

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    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