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    CVE-2021-4463

    Longjing Technology BEMS API versions up to and including 1.21 contains an unauthenticated arbitrary file download vulnerability in the 'downloads' endpoint. The 'fileName' parameter is not properly sanitized, allowing attackers to craft traversal sequences and access sensitive files outside the intended directory.

    Published:Nov 12, 2025
    Last Modified:Apr 15, 2026
    EPS:Nov 12, 2025
    EPSS Score:0.00161
    CVSS Score:8.7

    Affected Products

    Vendor
    Shenzhen Longjing Technology
    Product
    Bems Api

    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