{"cve":"CVE-2007-5638","nvd":{"published":"2007-10-23T17:46:00.000","modified":"2026-06-16T22:46:32.847","status":"Modified","description":"The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM), and other product lines, use only 65536 different values in the 32-bit ID number field of an RUDP datagram, which makes it easier for remote attackers to guess the RUDP ID and spoof messages.  NOTE: this can be leveraged for an eavesdropping attack by sending many Open Audio Stream messages.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-200","CWE-310"],"references":["http://osvdb.org/41770","http://secunia.com/advisories/27234","http://securityreason.com/securityalert/3272","http://www.csnc.ch/static/advisory/csnc/nortel_IP_phone_surveillance_mode_v1.0.txt","http://www.securityfocus.com/archive/1/482478/100/0/threaded"],"products":["nortel:business_communications_manager","nortel:centrex_ip_client_manager","nortel:centrex_ip_element_manager","nortel:meridian_option_11c","nortel:meridian_option_51c","nortel:meridian_option_61c","nortel:meridian_option_81c","nortel:meridian_sl100","nortel:mobile_voice_client_2050"],"source":"nvd","synced_at":"2026-10-19T19:48:28.501292361+00:00"},"epss":{"cve":"CVE-2007-5638","score":0.01473,"percentile":0.73801,"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."]}