CVE-2007-5639

7.1 HIGH 2% exploit odds Fix listed

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of service disruption.
Exploit odds: 1.8% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2007-10-23 17:46 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 22:46 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 1.8% in the next 30 days (EPSS).
Severity: 7.1 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2007-10-23 17:46 UTC
Last modified: 2026-06-16 22:46 UTC
Exploit probability: 1.8% · EPSS, next 30 days
Record status: Modified

Affected

Nortel Ip Softphone 2050
Nortel Mobile Voice Client 2050

Attack profile CVSS 2.0 · 7.1

Attack vector: Network
Complexity: Medium
Authentication: None
Confidentiality: None
Integrity: None
Availability: Complete

Raw vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2007-5639.md and follow it. Check whether this project is affected by CVE-2007-5639. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record