{"id":"CVE-2008-4963","aliases":["EUVD-2008-4942","GHSA-7hp5-2w63-5xvj"],"status":"published","title":"Unspecified vulnerability in the VLAN Trunking Protocol (VTP) implementation on Cisco IOS and...","description":"Unspecified vulnerability in the VLAN Trunking Protocol (VTP) implementation on Cisco IOS and CatOS, when the VTP operating mode is not transparent, allows remote attackers to cause a denial of service (device reload or hang) via a crafted VTP packet sent to a switch interface configured as a trunk port.","severity":{"version":"2.0","score":7.1,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01684,"percentile":0.77136,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2008-11-06T11:00:00Z","modified":"2026-06-16T22:58:50Z","products":[{"vendor":"cisco","product":"catos"},{"vendor":"cisco","product":"ios"}],"references":[{"url":"http://secunia.com/advisories/32573","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory"]},{"url":"http://www.cisco.com/en/US/products/products_security_response09186a0080a231cf.html","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Vendor Advisory"]},{"url":"http://securitytracker.com/id?1021143","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"http://www.securitytracker.com/id?1021144","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/46346","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://www.securityfocus.com/bid/32120","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://osvdb.org/49601","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2008-4963"},{"url":"https://github.com/advisories/GHSA-7hp5-2w63-5xvj"}],"sources":{"cve":[{"id":"CVE-2008-4963","description":"Unspecified vulnerability in the VLAN Trunking Protocol (VTP) implementation on Cisco IOS and CatOS, when the VTP operating mode is not transparent, allows remote attackers to cause a denial of service (device reload or hang) via a crafted VTP packet sent to a switch interface configured as a trunk port.","status":"published","published":"2008-11-06T11:00:00Z","modified":"2024-08-07T10:31:28.334Z","updated_at":"2026-11-02T14:34:47.310062Z"}],"euvd":[{"id":"EUVD-2008-4942","description":"Unspecified vulnerability in the VLAN Trunking Protocol (VTP) implementation on Cisco IOS and CatOS, when the VTP operating mode is not transparent, allows remote attackers to cause a denial of service (device reload or hang) via a crafted VTP packet sent to a switch interface configured as a trunk port.","status":"published","published":"2008-11-06T11:00:00Z","modified":"2024-08-07T10:31:28Z","updated_at":"2026-11-03T01:38:45.484352Z"}],"ghsa":[{"id":"GHSA-7hp5-2w63-5xvj","title":"Unspecified vulnerability in the VLAN Trunking Protocol (VTP) implementation on Cisco IOS and...","description":"Unspecified vulnerability in the VLAN Trunking Protocol (VTP) implementation on Cisco IOS and CatOS, when the VTP operating mode is not transparent, allows remote attackers to cause a denial of service (device reload or hang) via a crafted VTP packet sent to a switch interface configured as a trunk port.","status":"published","published":"2022-05-17T02:18:32Z","modified":"2023-01-27T05:04:04Z","updated_at":"2026-11-02T14:42:23.117332Z"}],"nvd":[{"id":"CVE-2008-4963","description":"Unspecified vulnerability in the VLAN Trunking Protocol (VTP) implementation on Cisco IOS and CatOS, when the VTP operating mode is not transparent, allows remote attackers to cause a denial of service (device reload or hang) via a crafted VTP packet sent to a switch interface configured as a trunk port.","status":"published","published":"2008-11-06T15:55:51.713Z","modified":"2026-06-16T22:58:50.91Z","cvss":[{"version":"2.0","score":7.1,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:01:29.702694Z"}]}}