CVE Feed

    Dashboard / CVE / CVE-2006-4776

    CVE-2006-4776

    Heap-based buffer overflow in the VLAN Trunking Protocol (VTP) feature in Cisco IOS 12.1(19) allows remote attackers to execute arbitrary code via a long VLAN name in a VTP type 2 summary advertisement.

    Published:Sep 14, 2006
    Last Modified:Apr 16, 2026
    EPS:Sep 14, 2006
    EPSS Score:0.17272
    CVSS Score:7.5

    Affected Products

    Vendor
    Cisco
    Product
    Ios

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-20301 (CVSS 8.6) — A vulnerability in the Extensible Messaging Client Protocol (XMCP), also referred to as the External Client pr…
    CVE-2026-20125 (CVSS 7.7) — A vulnerability in the HTTP Server feature of Cisco IOS Software and Cisco IOS XE Software Release 3E could al…
    CVE-2026-20012 (CVSS 8.6) — A vulnerability in the Internet Key Exchange version 2 (IKEv2) feature of Cisco IOS Software, Cisco IOS XE Sof…
    CVE-2025-20363 (CVSS 9) — A vulnerability in the web services of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, Cisco…
    CVE-2025-20149 (CVSS 6.5) — A vulnerability in the CLI of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local…
    CVE-2025-20327 (CVSS 7.7) — A vulnerability in the web UI of Cisco IOS Software could allow an authenticated, remote attacker with low pri…
    CVE-2025-20352 (CVSS 7.7) — A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software and Cisco IOS…
    CVE-2025-20160 (CVSS 8.1) — A vulnerability in the implementation of the TACACS+ protocol in Cisco IOS Software and Cisco IOS XE Software …
    CVE-2025-20253 (CVSS 8.6) — A vulnerability in the IKEv2 feature of Cisco IOS Software, IOS XE Software, Secure Firewall ASA Software, and…
    CVE-2025-20239 (CVSS 8.6) — A vulnerability in the Internet Key Exchange Version 2 (IKEv2) feature of Cisco IOS Software, IOS XE Software,…

    References

    http://secunia.com/advisories/21896
    http://securitytracker.com/id?1016843
    http://www.cisco.com/warp/public/707/cisco-sr-20060913-vtp.shtml
    http://www.kb.cert.org/vuls/id/542108
    http://www.osvdb.org/28777
    http://www.phenoelit.de/stuff/CiscoVTP.txt
    http://www.securityfocus.com/archive/1/445896/100/0/threaded
    http://www.securityfocus.com/archive/1/445938/100/0/threaded
    http://www.securityfocus.com/bid/19998
    http://www.vupen.com/english/advisories/2006/3600
    http://www.vupen.com/english/advisories/2006/3601
    https://exchange.xforce.ibmcloud.com/vulnerabilities/28927
    http://secunia.com/advisories/21896
    http://securitytracker.com/id?1016843
    http://www.cisco.com/warp/public/707/cisco-sr-20060913-vtp.shtml
    http://www.kb.cert.org/vuls/id/542108
    http://www.osvdb.org/28777
    http://www.phenoelit.de/stuff/CiscoVTP.txt
    http://www.securityfocus.com/archive/1/445896/100/0/threaded
    http://www.securityfocus.com/archive/1/445938/100/0/threaded
    http://www.securityfocus.com/bid/19998
    http://www.vupen.com/english/advisories/2006/3600
    http://www.vupen.com/english/advisories/2006/3601
    https://exchange.xforce.ibmcloud.com/vulnerabilities/28927

    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