Unrated severityNVD Advisory· Published Oct 23, 2007· Updated Jun 16, 2026
CVE-2007-5640
CVE-2007-5640
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
18cpe:2.3:a:nortel:business_communications_manager:1000:*:*:*:*:*:*:*+ 7 more
- cpe:2.3:a:nortel:business_communications_manager:1000:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:business_communications_manager:200:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:business_communications_manager:400:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:business_communications_manager:50:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:business_communications_manager:50a:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:business_communications_manager:50e:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:business_communications_manager:srg200:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:business_communications_manager:srg50:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:centrex_ip_client_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:centrex_ip_element_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:meridian_option_11c:*:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:meridian_option_51c:*:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:meridian_option_61c:*:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:meridian_option_81c:*:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:meridian_sl100:cs2100:*:*:*:*:*:*:*
- cpe:2.3:a:nortel:mobile_voice_client_2050:*:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
8- support.nortel.com/go/main.jspnvdPatch
- www.csnc.ch/static/advisory/csnc/nortel_IP_phone_forced_re-authentication_v1.0.txtnvdExploit
- secunia.com/advisories/27234nvdVendor Advisory
- osvdb.org/41772nvd
- securityreason.com/securityalert/3274nvd
- www.securityfocus.com/archive/1/482481/100/0/threadednvd
- www.securityfocus.com/bid/26124nvd
- exchange.xforce.ibmcloud.com/vulnerabilities/37254nvd
News mentions
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