5

CVE-2009-2534: realnetworks helix_server Improper Input Validation

Modified
Published 20-07-2009Last modified 07-08-2024

Vulnerability summary

CVE-2009-2534 is a medium (CVSS 5.0) Improper Input Validation vulnerability in realnetworks helix_server. EPSS estimates a 8.83% chance of exploitation in the next 30 days, higher than 95.1% of scored vulnerabilities. 2 public exploits are recorded.

Priority
Routine

Not severe (CVSS 5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.0/10
010
Medium · v2.0 (NVD)
EPSS score
8.83%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits2reference, exploit-database

Timeline

  1. 20-07-2009
    PublishedVulnerability first disclosed.
  2. 07-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

8.83%

Chance of exploitation in the next 30 days

Percentile

95%

Versus all other CVEs

30-day change

No change 0.00 pp

From 8.83% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

2 found
  • referenceUnverified

    Exploit Reference (coresecurity.com)

    Maturity: unknown

  • exploit-databasedosmultipleVerified

    Real Helix DNA - 'RTSP' / 'SETUP' Request Handler

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.

Realnetworks2 products

1 vendor · 2 products

References

7 links