HIGH
CVE-2007-5639
NVD-CWE-OtherPublished: October 23, 2007· Updated: Jun 16, 2026
7.1
CVSS v3.1
Official Description
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.
Technical Analysis
CVE-2007-5639 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityM
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityNone
AvailabilityC
AV:N/AC:M/Au:N/C:N/I:N/A:C
Affected Vendors & Products
nortel15 product(s)
ip audio conference phone 2033ip phone 1110ip phone 1120eip phone 1140eip phone 1150eip phone 2001ip phone 2002ip phone 2004wlan handset 2210wlan handset 2211wlan handset 2212wlan handset 6120+3
Source: NVD CPE · 15 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
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GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
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PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories
All References (12)
Quick Facts
CVE IDCVE-2007-5639
CVSS Score7.1 / 10
SeverityHIGH
WeaknessNVD-CWE-Other
CISA KEVNo
Affected1 vendor(s)
PublishedOct 23, 2007
Related CVEs (NVD-CWE-Other)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2007-5639 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.