CVE-2007-5638
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,…
Does this matter?
Lower severity and a low EPSS score (1.47%). Track it; it rarely justifies an emergency change on its own.
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 2.0
- 4.3 MEDIUMAV:N/AC:M/Au:N/C:P/I:N/A:N
- EPSS
- 1.47% probability · 74th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- 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
- Source
- cve@mitre.org
EPSS 1.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://osvdb.org/41770
- http://secunia.com/advisories/27234Patch, Vendor Advisory
- http://securityreason.com/securityalert/3272
- http://www.csnc.ch/static/advisory/csnc/nortel_IP_phone_surveillance_mode_v1.0.txtExploit
- http://www.securityfocus.com/archive/1/482478/100/0/threaded
- http://www.securityfocus.com/bid/26120Exploit
- https://exchange.xforce.ibmcloud.com/vulnerabilities/37255
- https://exchange.xforce.ibmcloud.com/vulnerabilities/42881
- http://osvdb.org/41770
- http://secunia.com/advisories/27234Patch, Vendor Advisory
- http://securityreason.com/securityalert/3272
- http://www.csnc.ch/static/advisory/csnc/nortel_IP_phone_surveillance_mode_v1.0.txtExploit
- http://www.securityfocus.com/archive/1/482478/100/0/threaded
- http://www.securityfocus.com/bid/26120Exploit
- https://exchange.xforce.ibmcloud.com/vulnerabilities/37255
- https://exchange.xforce.ibmcloud.com/vulnerabilities/42881
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.