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    CVE-2021-4459

    An authorized remote attacker can access files and directories outside the intended web root, potentially exposing sensitive system information of the affected Sunny Boy devices.

    Published:Aug 27, 2025
    Last Modified:Apr 15, 2026
    EPS:Aug 27, 2025
    EPSS Score:0.00065
    CVSS Score:6.5

    Affected Products

    Vendor
    Sma
    Product
    Sunny Boy
    Vendor
    Sma
    Product
    Sunny Boy 1.5
    Vendor
    Sma
    Product
    Sunny Boy 2.5
    Vendor
    Sma
    Product
    Sunny Boy 3.0
    Vendor
    Sma
    Product
    Sunny Boy 3.6
    Vendor
    Sma
    Product
    Sunny Boy 4.0
    Vendor
    Sma
    Product
    Sunny Boy 5.0
    Vendor
    Sma
    Product
    Sunny Boy 6.0

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-23 Relative Path Traversal

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-139 Relative Path Traversal
    CAPEC-76 Manipulating Web Input to File System Calls

    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