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    CVE-1999-1129

    Cisco Catalyst 2900 Virtual LAN (VLAN) switches allow remote attackers to inject 802.1q frames into another VLAN by forging the VLAN identifier in the trunking tag.

    Published:Sep 1, 1999
    Last Modified:Apr 16, 2026
    EPS:Sep 12, 2001
    EPSS Score:0.00874
    CVSS Score:7.5

    Affected Products

    Vendor
    Cisco
    Product
    Catalyst 2900 Vlan
    Vendor
    Cisco
    Product
    Ios

    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