CVE-2009-2534

Exp

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.

Published: 2009-07-20 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-2534 is rated High Exploit Risk (65.4/100): CVSS Medium severity, with high exploitation likelihood (EPSS 9.23%, 93th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2009-2534

EDB-ID Source Kind Published Link
9198 exploit_db edb 2009-07-17 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2009-2534

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-05 11.17% 9.23% -1.94%
2 2025-03-30 13.81% 11.17% -2.64%
3 2025-03-29 — 13.81% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-2534

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2009-2534

Affected software / configurations for CVE-2009-2534

Vendor Product Version Raw CPE
realnetworks helix_server <= 12.0.1 cpe:2.3:a:realnetworks:helix_server:*:*:*:*:*:*:*:*
realnetworks helix_server 11.0 cpe:2.3:a:realnetworks:helix_server:11.0:*:*:*:*:*:*:*
realnetworks helix_server 12.0.0 cpe:2.3:a:realnetworks:helix_server:12.0.0:*:*:*:*:*:*:*
realnetworks helix_server_mobile <= 12.0.0 cpe:2.3:a:realnetworks:helix_server_mobile:*:*:*:*:*:*:*:*
realnetworks helix_server_mobile 11.0 cpe:2.3:a:realnetworks:helix_server_mobile:11.0:*:*:*:*:*:*:*

References for CVE-2009-2534

cvelogic Threat Intelligence