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    CVE-2000-0457

    ISM.DLL in IIS 4.0 and 5.0 allows remote attackers to read file contents by requesting the file and appending a large number of encoded spaces (%20) and terminated with a .htr extension, aka the ".HTR File Fragment Reading" or "File Fragment Reading via .HTR" vulnerability.

    Published:May 11, 2000
    Last Modified:Apr 16, 2026
    EPS:Mar 9, 2002
    EPSS Score:0.84385
    CVSS Score:7.5

    Affected Products

    Vendor
    Microsoft
    Product
    Internet Information Server
    Vendor
    Microsoft
    Product
    Internet Information Services

    Exploits

    https://www.exploit-db.com/exploits/19908

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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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