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    CVE-2001-0004

    IIS 5.0 and 4.0 allows remote attackers to read the source code for executable web server programs by appending "%3F+.htr" to the requested URL, which causes the files to be parsed by the .HTR ISAPI extension, aka a variant of the "File Fragment Reading via .HTR" vulnerability.

    Published:Feb 12, 2001
    Last Modified:Apr 16, 2026
    EPS:Sep 18, 2001
    EPSS Score:0.74228
    CVSS Score:5

    Affected Products

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

    Exploits

    No exploit reference

    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