CVE-2007-3361: Nortel Pc Client Soft Phone SIP

High severity, CVSS 7.8. EPSS: 1.9% chance of exploitation in the next 30 days.

The Nortel PC Client SIP Soft Phone 4.1 3.5.208[20051015] allows remote attackers to cause a denial of service (device crash) via a SIP message with a malformed header.

Affected products

• Nortel Pc Client Soft Phone SIP: version 4.1 only

Published 2007-06-22. Last modified 2026-06-16.