{"id":"CVE-2009-2052","aliases":["EUVD-2009-2048","GHSA-qj8c-mx4x-hh37"],"status":"published","title":"Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6...","description":"Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6.x before 6.1(4), 7.0 before 7.0(2), and 7.1 before 7.1(2); and Cisco Unified Presence 1.x, 6.x before 6.0(6), and 7.x before 7.0(4); allows remote attackers to cause a denial of service (TCP services outage) via a large number of TCP connections, related to \"tracking of network connections,\" aka Bug IDs CSCsq22534 and CSCsw52371.","severity":{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.03975,"percentile":0.90558,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2009-08-27T16:31:00Z","modified":"2026-06-16T23:08:39Z","products":[{"vendor":"cisco","product":"unified_communications_manager"}],"references":[{"url":"http://www.vupen.com/english/advisories/2009/2915","tags":["vdb-entry","x_refsource_VUPEN","x_transferred","Third Party Advisory"]},{"url":"http://secunia.com/advisories/36499","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory"]},{"url":"http://secunia.com/advisories/37039","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Third Party Advisory"]},{"url":"http://securitytracker.com/id?1023018","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://www.securityfocus.com/bid/36152","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://secunia.com/advisories/36498","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory"]},{"url":"http://www.cisco.com/en/US/products/products_security_advisory09186a0080afc930.shtml","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Vendor Advisory"]},{"url":"http://www.cisco.com/en/US/products/products_security_advisory09186a0080af2d11.shtml","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Patch","Vendor Advisory"]},{"url":"http://www.securitytracker.com/id?1022775","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://www.securityfocus.com/bid/36676","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-2052"},{"url":"https://github.com/advisories/GHSA-qj8c-mx4x-hh37"}],"sources":{"cve":[{"id":"CVE-2009-2052","description":"Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6.x before 6.1(4), 7.0 before 7.0(2), and 7.1 before 7.1(2); and Cisco Unified Presence 1.x, 6.x before 6.0(6), and 7.x before 7.0(4); allows remote attackers to cause a denial of service (TCP services outage) via a large number of TCP connections, related to \"tracking of network connections,\" aka Bug IDs CSCsq22534 and CSCsw52371.","status":"published","published":"2009-08-27T16:31:00Z","modified":"2024-08-07T05:36:20.518Z","updated_at":"2026-11-02T14:33:23.041383Z"}],"euvd":[{"id":"EUVD-2009-2048","description":"Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6.x before 6.1(4), 7.0 before 7.0(2), and 7.1 before 7.1(2); and Cisco Unified Presence 1.x, 6.x before 6.0(6), and 7.x before 7.0(4); allows remote attackers to cause a denial of service (TCP services outage) via a large number of TCP connections, related to \"tracking of network connections,\" aka Bug IDs CSCsq22534 and CSCsw52371.","status":"published","published":"2009-08-27T16:31:00Z","modified":"2024-08-07T05:36:20Z","updated_at":"2026-11-03T01:39:18.878997Z"}],"ghsa":[{"id":"GHSA-qj8c-mx4x-hh37","title":"Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6...","description":"Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6.x before 6.1(4), 7.0 before 7.0(2), and 7.1 before 7.1(2); and Cisco Unified Presence 1.x, 6.x before 6.0(6), and 7.x before 7.0(4); allows remote attackers to cause a denial of service (TCP services outage) via a large number of TCP connections, related to \"tracking of network connections,\" aka Bug IDs CSCsq22534 and CSCsw52371.","status":"published","published":"2022-05-02T03:31:15Z","modified":"2023-01-31T05:07:45Z","updated_at":"2026-11-02T14:49:16.045862Z"}],"nvd":[{"id":"CVE-2009-2052","description":"Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6.x before 6.1(4), 7.0 before 7.0(2), and 7.1 before 7.1(2); and Cisco Unified Presence 1.x, 6.x before 6.0(6), and 7.x before 7.0(4); allows remote attackers to cause a denial of service (TCP services outage) via a large number of TCP connections, related to \"tracking of network connections,\" aka Bug IDs CSCsq22534 and CSCsw52371.","status":"published","published":"2009-08-27T17:00:01Z","modified":"2026-06-16T23:08:39.843Z","cvss":[{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:01:36.596719Z"}]}}