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    CVE-2009-2521

    Stack consumption vulnerability in the FTP Service in Microsoft Internet Information Services (IIS) 5.0 through 7.0 allows remote authenticated users to cause a denial of service (daemon crash) via a list (ls) -R command containing a wildcard that references a subdirectory, followed by a .. (dot dot), aka "IIS FTP Service DoS Vulnerability."

    Published:Sep 4, 2009
    Last Modified:Apr 23, 2026
    EPS:Sep 4, 2009
    EPSS Score:0.60775
    CVSS Score:5

    Affected Products

    Vendor
    Microsoft
    Product
    Internet Information Services

    Exploits

    https://www.exploit-db.com/exploits/9587https://www.exploit-db.com/exploits/17476

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    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