CVE-2006-0738: Estara Softphone

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

Multiple format string vulnerabilities in eStara SIP softphone allow remote attackers to cause a denial of service (hang) via SIP INVITE requests with format string specifiers in the SDP session description, as demonstrated using (1) the field name, (2) the o field (owner/creator and session identifier), or (3) the m field (media name and transport address).

Affected products

• Estara Softphone: up to and including 3.0.1.47

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