CVE-2009-2534: Realnetworks Helix Server

Medium severity, CVSS 5.0. EPSS: 8.8% chance of exploitation in the next 30 days.

RealNetworks Helix Server and Helix Mobile Server before 13.0.0 allow remote attackers to cause a denial of service (daemon crash) via an RTSP SETUP request that (1) specifies the / URI or (2) lacks a / character in the URI.

Affected products

• Realnetworks Helix Server: up to and including 12.0.1; version 11.0 only; version 12.0.0 only
• Realnetworks Helix Server Mobile: up to and including 12.0.0; version 11.0 only

Published 2009-07-20. Last modified 2026-06-16.