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    CVE-2000-0268

    Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot.

    Published:Apr 20, 2000
    Last Modified:Apr 16, 2026
    EPS:Jun 2, 2000
    EPSS Score:0.00739
    CVSS Score:5

    Affected Products

    Vendor
    Cisco
    Product
    3660 Router
    Vendor
    Cisco
    Product
    7100 Router
    Vendor
    Cisco
    Product
    7200 Router
    Vendor
    Cisco
    Product
    7500 Router
    Vendor
    Cisco
    Product
    Accesspath
    Vendor
    Cisco
    Product
    As5200
    Vendor
    Cisco
    Product
    As5300
    Vendor
    Cisco
    Product
    As5800
    Vendor
    Cisco
    Product
    Ios
    Vendor
    Cisco
    Product
    System Controller 3640
    Vendor
    Cisco
    Product
    Ubr7200
    Vendor
    Cisco
    Product
    Voice Gateway As5800

    Exploits

    No exploit reference

    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