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    CVE-2001-0669

    Various Intrusion Detection Systems (IDS) including (1) Cisco Secure Intrusion Detection System, (2) Cisco Catalyst 6000 Intrusion Detection System Module, (3) Dragon Sensor 4.x, (4) Snort before 1.8.1, (5) ISS RealSecure Network Sensor 5.x and 6.x before XPU 3.2, and (6) ISS RealSecure Server Sensor 5.5 and 6.0 for Windows, allow remote attackers to evade detection of HTTP attacks via non-standard "%u" Unicode encoding of ASCII characters in the requested URL.

    Published:Oct 12, 2001
    Last Modified:Apr 16, 2026
    EPS:Oct 12, 2001
    EPSS Score:0.41484
    CVSS Score:7.5

    Affected Products

    Vendor
    Cisco
    Product
    Catalyst 6000 Intrusion Detection System Module
    Vendor
    Cisco
    Product
    Secure Intrusion Detection System
    Vendor
    Enterasys
    Product
    Dragon
    Vendor
    Iss
    Product
    Realsecure Network Sensor
    Vendor
    Iss
    Product
    Realsecure Server Sensor
    Vendor
    Snort
    Product
    Snort

    Exploits

    https://www.exploit-db.com/exploits/21100

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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