{"cve":{"cve_id":"CVE-2009-2051","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.03436,"epss_percentile":0.87414,"epss_as_of":"2026-06-23","description":"Cisco IOS 12.2 through 12.4 and 15.0 through 15.1, Cisco IOS XE 2.5.x and 2.6.x before 2.6.1, and Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6.x before 6.1(4), and 7.x before 7.1(2) allow remote attackers to cause a denial of service (device reload or voice-services outage) via a malformed SIP INVITE message that triggers an improper call to the sipSafeStrlen function, aka Bug IDs CSCsz40392 and CSCsz43987.","published_at":"2009-08-27T16:31:00Z","last_modified_at":"2026-06-16T23:08:39.720000Z","cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["http://osvdb.org/57453","http://secunia.com/advisories/36499","http://www.securityfocus.com/bid/36152","http://secunia.com/advisories/36498","http://www.cisco.com/en/US/products/products_security_advisory09186a0080af2d11.shtml","http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a30f.shtml","http://www.securitytracker.com/id?1022775"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:05:03.540203Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"cisco","vendor_name":"Cisco","product_slug":"ios","product_name":"IOS","version_start":"12.2","version_start_inclusive":true,"version_end":"12.4","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*"},{"vendor_slug":"cisco","vendor_name":"Cisco","product_slug":"ios-xe","product_name":"ios_xe","version_start":"2.5.0","version_start_inclusive":true,"version_end":"2.6.1","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*"},{"vendor_slug":"cisco","vendor_name":"Cisco","product_slug":"unified-communications-manager","product_name":"unified_communications_manager","version_start":"5.0","version_start_inclusive":true,"version_end":"5.1\\(3g\\)","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"http://osvdb.org/57453","source_type":"MISC","tags":[]},{"url":"http://secunia.com/advisories/36499","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.securityfocus.com/bid/36152","source_type":"MISC","tags":[]},{"url":"http://secunia.com/advisories/36498","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.cisco.com/en/US/products/products_security_advisory09186a0080af2d11.shtml","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a30f.shtml","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.securitytracker.com/id?1022775","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2009-08-27T16:31:00Z","label":"CVE published","source":null}]}