{"id":"CVE-2007-5638","url":"https://www.cyber-defence.io/tools/cve/CVE-2007-5638","generatedAt":"2026-10-27T18:33:07.211Z","title":"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,…","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.","published":"2007-10-23T17:46:00.000Z","lastModified":"2026-06-16T22:46:33.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":4.3,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N"},"cwe":["CWE-200","CWE-310"],"affected":["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"],"epss":{"score":0.01473,"percentile":0.73614,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.47%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://osvdb.org/41770","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/27234","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://securityreason.com/securityalert/3272","source":"cve@mitre.org"},{"url":"http://www.csnc.ch/static/advisory/csnc/nortel_IP_phone_surveillance_mode_v1.0.txt","tags":["Exploit"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/archive/1/482478/100/0/threaded","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/26120","tags":["Exploit"],"source":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/37255","source":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/42881","source":"cve@mitre.org"},{"url":"http://osvdb.org/41770","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/27234","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://securityreason.com/securityalert/3272","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.csnc.ch/static/advisory/csnc/nortel_IP_phone_surveillance_mode_v1.0.txt","tags":["Exploit"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/482478/100/0/threaded","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/26120","tags":["Exploit"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/37255","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/42881","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2007-5638","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}