CVE-2007-5640
The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM), Mobile Voice Client, and other product lines, allow remote attackers to block calls and force re-registration via a resume message to the Signaling Server that has a spoofed source IP address for the phone. NOTE: the attack is more disruptive if a new spoofed resume message is sent after each re-registration.
Key facts
- CVSS score
- 7.1 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:C- EPSS score
- 1.8% (79th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2007-5612)
- Published
- October 23, 2007
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2007-5612 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- nortel / business communications manager
- nortel / business communications manager
- nortel / business communications manager
- nortel / business communications manager
- nortel / business communications manager
- nortel / business communications manager
- nortel / business communications manager
- nortel / business communications manager
- nortel / centrex ip client manager
- nortel / centrex ip element manager
- nortel / communications server
- nortel / communications server
- nortel / communications server
- nortel / communications server
- nortel / ip audio conference phone 2033
- nortel / ip phone 1110
- nortel / ip phone 1120e
- nortel / ip phone 1140e
- nortel / ip phone 1150e
- nortel / ip phone 2001
- nortel / ip phone 2002
- nortel / ip phone 2004
- nortel / ip phone 2007
- nortel / meridian option 11c
- nortel / meridian option 51c
- nortel / meridian option 61c
- nortel / meridian option 81c
- nortel / meridian sl100
- nortel / mobile voice client 2050
- nortel / multimedia communication server 5100
- nortel / multimedia communication server 5200
- nortel / wlan handset 2210
- nortel / wlan handset 2211
- nortel / wlan handset 2212
- nortel / wlan handset 6120
- nortel / wlan handset 6140
References
- http://osvdb.org/41772
- http://secunia.com/advisories/27234(Vendor Advisory)
- http://securityreason.com/securityalert/3274
- http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=654641(Patch)
- http://www.csnc.ch/static/advisory/csnc/nortel_IP_phone_forced_re-authentication_v1.0.txt(Exploit)
- http://www.securityfocus.com/archive/1/482481/100/0/threaded
- http://www.securityfocus.com/bid/26124
- https://exchange.xforce.ibmcloud.com/vulnerabilities/37254
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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