CVE-2006-0737: Estara Softphone

Medium severity, CVSS 5.0. EPSS: 3.1% chance of exploitation in the next 30 days.

eStara SIP softphone allows remote attackers to cause a denial of service (crash) via a SIP OPTIONS request with a negative Expires field.

Affected products

• Estara Softphone: up to and including 3.0.1.47

Published 2006-02-17. Last modified 2026-06-16.