{"cve":"CVE-2009-2051","nvd":{"published":"2009-08-27T17:00:00.953","modified":"2026-06-16T23:08:39.720","status":"Modified","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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://osvdb.org/57453","http://secunia.com/advisories/36498","http://secunia.com/advisories/36499","http://www.cisco.com/en/US/products/products_security_advisory09186a0080af2d11.shtml","http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a30f.shtml"],"products":["cisco:ios","cisco:ios_xe","cisco:unified_communications_manager"],"source":"nvd","synced_at":"2026-10-19T19:54:26.868835795+00:00"},"epss":{"cve":"CVE-2009-2051","score":0.03436,"percentile":0.88959,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}