{"id":"CVE-2018-0409","aliases":["EUVD-2018-1232","GHSA-qqxj-4rg7-qpmv"],"status":"published","title":"A vulnerability in the XCP Router service of the Cisco Unified Communications Manager IM \u0026...","description":"A vulnerability in the XCP Router service of the Cisco Unified Communications Manager IM \u0026 Presence Service (CUCM IM\u0026P) and the Cisco TelePresence Video Communication Server (VCS) and Expressway could allow an unauthenticated, remote attacker to cause a temporary service outage for all IM\u0026P users, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending a malicious IPv4 or IPv6 packet to an affected device on TCP port 7400. An exploit could allow the attacker to overread a buffer, resulting in a crash and restart of the XCP Router service. Cisco Bug IDs: CSCvg97663, CSCvi55947.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03446,"percentile":0.89087,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125","CWE-20"],"published":"2018-08-15T20:00:00Z","modified":"2026-06-17T01:30:43Z","products":[{"vendor":"cisco","product":"telepresence_video_communication_server"},{"vendor":"cisco","product":"unified_communications_manager_im_and_presence_service"},{"vendor":"cisco systems, inc.","product":"telepresence video communication server (vcs) and expressway"},{"vendor":"cisco systems, inc.","product":"unified communications manager im \u0026 presence service (cucm im\u0026p)"}],"references":[{"url":"http://www.securitytracker.com/id/1041534","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://www.securityfocus.com/bid/105104","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815-ucmimps-dos","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Vendor Advisory"]},{"url":"http://www.securitytracker.com/id/1041533","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://www.securityfocus.com/bid/105102","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-0409"},{"url":"https://github.com/advisories/GHSA-qqxj-4rg7-qpmv"}],"sources":{"cve":[{"id":"CVE-2018-0409","description":"A vulnerability in the XCP Router service of the Cisco Unified Communications Manager IM \u0026 Presence Service (CUCM IM\u0026P) and the Cisco TelePresence Video Communication Server (VCS) and Expressway could allow an unauthenticated, remote attacker to cause a temporary service outage for all IM\u0026P users, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending a malicious IPv4 or IPv6 packet to an affected device on TCP port 7400. An exploit could allow the attacker to overread a buffer, resulting in a crash and restart of the XCP Router service. Cisco Bug IDs: CSCvg97663, CSCvi55947.","status":"published","published":"2018-08-15T20:00:00Z","modified":"2024-11-26T14:48:15.449Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:35:12.160284Z"}],"euvd":[{"id":"EUVD-2018-1232","description":"A vulnerability in the XCP Router service of the Cisco Unified Communications Manager IM \u0026 Presence Service (CUCM IM\u0026P) and the Cisco TelePresence Video Communication Server (VCS) and Expressway could allow an unauthenticated, remote attacker to cause a temporary service outage for all IM\u0026P users, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending a malicious IPv4 or IPv6 packet to an affected device on TCP port 7400. An exploit could allow the attacker to overread a buffer, resulting in a crash and restart of the XCP Router service. Cisco Bug IDs: CSCvg97663, CSCvi55947.","status":"published","published":"2018-08-15T20:00:00Z","modified":"2024-11-26T14:48:15Z","updated_at":"2026-11-03T00:04:47.599292Z"}],"ghsa":[{"id":"GHSA-qqxj-4rg7-qpmv","title":"A vulnerability in the XCP Router service of the Cisco Unified Communications Manager IM \u0026...","description":"A vulnerability in the XCP Router service of the Cisco Unified Communications Manager IM \u0026 Presence Service (CUCM IM\u0026P) and the Cisco TelePresence Video Communication Server (VCS) and Expressway could allow an unauthenticated, remote attacker to cause a temporary service outage for all IM\u0026P users, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending a malicious IPv4 or IPv6 packet to an affected device on TCP port 7400. An exploit could allow the attacker to overread a buffer, resulting in a crash and restart of the XCP Router service. Cisco Bug IDs: CSCvg97663, CSCvi55947.","status":"published","published":"2022-05-13T01:17:46Z","modified":"2023-02-01T05:05:21Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:50:14.297796Z"}],"nvd":[{"id":"CVE-2018-0409","description":"A vulnerability in the XCP Router service of the Cisco Unified Communications Manager IM \u0026 Presence Service (CUCM IM\u0026P) and the Cisco TelePresence Video Communication Server (VCS) and Expressway could allow an unauthenticated, remote attacker to cause a temporary service outage for all IM\u0026P users, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending a malicious IPv4 or IPv6 packet to an affected device on TCP port 7400. An exploit could allow the attacker to overread a buffer, resulting in a crash and restart of the XCP Router service. Cisco Bug IDs: CSCvg97663, CSCvi55947.","status":"published","published":"2018-08-15T20:29:00.533Z","modified":"2026-06-17T01:30:43.077Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20","CWE-125"],"updated_at":"2026-11-02T14:04:36.842579Z"}]}}