{"id":"CVE-2006-4776","aliases":["EUVD-2006-4763","GHSA-w4j4-63w3-w6m9"],"status":"published","title":"Heap-based buffer overflow in the VLAN Trunking Protocol (VTP) feature in Cisco IOS 12.1(19)...","description":"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.","severity":{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.07962,"percentile":0.94786,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-119"],"published":"2006-09-14T00:00:00Z","modified":"2026-06-16T22:29:46Z","products":[{"vendor":"cisco","product":"ios"}],"references":[{"url":"http://www.kb.cert.org/vuls/id/542108","tags":["third-party-advisory","x_refsource_CERT-VN","x_transferred","US Government Resource"]},{"url":"http://www.vupen.com/english/advisories/2006/3601","tags":["vdb-entry","x_refsource_VUPEN","x_transferred","Vendor Advisory"]},{"url":"http://www.phenoelit.de/stuff/CiscoVTP.txt","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://secunia.com/advisories/21896","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory"]},{"url":"http://www.securityfocus.com/bid/19998","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://www.cisco.com/warp/public/707/cisco-sr-20060913-vtp.shtml","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Patch"]},{"url":"http://securitytracker.com/id?1016843","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"http://www.securityfocus.com/archive/1/445938/100/0/threaded","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"http://www.osvdb.org/28777","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/28927","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://www.vupen.com/english/advisories/2006/3600","tags":["vdb-entry","x_refsource_VUPEN","x_transferred","Vendor Advisory"]},{"url":"http://www.securityfocus.com/archive/1/445896/100/0/threaded","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-4776"},{"url":"https://github.com/advisories/GHSA-w4j4-63w3-w6m9"}],"sources":{"cve":[{"id":"CVE-2006-4776","description":"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.","status":"published","published":"2006-09-14T00:00:00Z","modified":"2024-08-07T19:23:41.091Z","updated_at":"2026-11-02T14:33:51.470623Z"}],"euvd":[{"id":"EUVD-2006-4763","description":"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.","status":"published","published":"2006-09-14T00:00:00Z","modified":"2024-08-07T19:23:41Z","updated_at":"2026-11-03T01:15:50.383789Z"}],"ghsa":[{"id":"GHSA-w4j4-63w3-w6m9","title":"Heap-based buffer overflow in the VLAN Trunking Protocol (VTP) feature in Cisco IOS 12.1(19)...","description":"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.","status":"published","published":"2022-05-01T07:22:01Z","modified":"2023-01-31T05:01:55Z","cwes":["CWE-119"],"updated_at":"2026-11-02T14:48:09.652829Z"}],"nvd":[{"id":"CVE-2006-4776","description":"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.","status":"published","published":"2006-09-14T00:07:00Z","modified":"2026-06-16T22:29:46.493Z","cvss":[{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:01:06.675668Z"}]}}