CVE-2004-0389: RealNetworks Helix Universal Server 9.0.1 and 9.0.2 allows remote attackers to cause a denial of service (c...

Security readout for executives and security teams

This is an old availability issue in RealNetworks Helix Universal Server 9.0.1 and 9.0.2. A remote attacker could crash the service by sending malformed media-control requests. The business impact is service interruption, not data theft based on the supplied evidence. Exposure is limited to organizations still running RealNetworks Helix Universal Server 9.0.1 or 9.0.2, especially if reachable from untrusted networks. The supplied affected-product metadata is incomplete, but the CVE description names those versions directly. Treat this as a legacy-service resilience issue. It is not supported by evidence of data compromise or active exploitation, but internet-exposed affected systems could suffer avoidable outages. Prioritize discovery, exposure reduction, and replacement planning. Mitigation focus: Inventory any RealNetworks Helix Universal Server deployments and confirm exact versions.; If version 9.0.1 or 9.0.2 exists, check vendor or archival advisory guidance.; Restrict access to exposed Helix services to trusted networks where possible..

Prepared

Jun 30, 2026, 05:56 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.