{"cve":"CVE-2007-5639","nvd":{"published":"2007-10-23T17:46:00.000","modified":"2026-06-16T22:46:32.987","status":"Modified","description":"The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and other Nortel IP Phone, Mobile Voice Client, and WLAN Handsets products allow remote attackers to cause a denial of service (device hang) via a flood of Mute and UnMute messages that have a spoofed source IP address for the Signaling Server.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://securityreason.com/securityalert/3273","http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=654715","http://www.csnc.ch/static/advisory/csnc/nortel_IP_phone_flooding_denial_of_service_v1.0.txt","http://www.securityfocus.com/archive/1/482480/100/0/threaded","http://www.securityfocus.com/bid/26122"],"products":["nortel:ip_softphone_2050","nortel:mobile_voice_client_2050"],"source":"nvd","synced_at":"2026-10-19T19:48:28.501292361+00:00"},"epss":{"cve":"CVE-2007-5639","score":0.0179,"percentile":0.78364,"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."]}