CVE-2007-5639
highpriority · track · 29EPSS 0.018 · 78 %ileEUUSEPSS · scored 2026-10-27
The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and other Nortel IP Phone, Mobile Voice Client, and WLAN Handsets products allow remote attackers to cause a denial of service (device hang) via a flood of Mute and UnMute messages that have a spoofed source IP address for the Signaling Server.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6–7.1
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (3)
Products and version ranges known to be affected.
- nortel mobile voice client 2050all versionsnvdUScpe:2.3:a:nortel:mobile_voice_client_2050:*:*:*:*:*:*:*:*
also known as (2)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (12)
External citations — patches, advisories, analysis.
- http://securityreason.com/securityalert/3273enisa_euvd
- http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=654715enisa_euvd
- http://www.csnc.ch/static/advisory/csnc/nortel_IP_phone_flooding_denial_of_service_v1.0.txtenisa_euvd
- http://www.securityfocus.com/archive/1/482480/100/0/threadedenisa_euvd
- http://www.securityfocus.com/bid/26122enisa_euvd
- https://exchange.xforce.ibmcloud.com/vulnerabilities/37253enisa_euvd
- http://securityreason.com/securityalert/3273nvd
- http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=654715Patchnvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan