RealNetworks Helix Universal Server 9.0.1 and 9.0.2 allows remote attackers to cause a denial of service (crash) via malformed requests that trigger a null dereference, as demonstrated using (1) GET_PARAMETER or (2) DESCRIBE requests.
CVE-2004-0389
Score elevated to 8.2 because EPSS predicts 55% probability of exploitation within the next 30 days (98th percentile of EPSS-scored CVEs). NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.
- High exploitation likelihood — EPSS 55%
- Public exploit code is available (Exploit-DB (verified), epss top5pct, epss high, public exploit)
A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).
- CVSS v3
- 7.5
- EG Score
- 8.2HIGHhigh confidence
- EG Risk
- 67EG Risk 67/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity82% × 45%Exploitation65% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low or medium mission impact and sooner than that at high; until then, restrict network exposure of the affected system or apply the vendor's mitigation. - EPSS PROB
- 55%
- EPSS %ILE
- 99th
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).
A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low or medium mission impact and sooner than that at high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
Exploitation public PoC (EG-KEV: weaponized) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
June 1, 2004
Last Modified
June 16, 2026
Advisory Details (3)
Auto-updated May 31, 2026Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 5× in last 7d / 8× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-10-10 19:53 UTCEPSS rescore
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- 2026-05-31 16:16 UTCGHSA enrichment
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Publicly available exploits
(1 reference)Public exploit code is referenced for this CVE (1 Exploit-DB entry). Defenders should treat patch urgency accordingly.
- Exploit-DBEDB-24010✓ verifiedPublished Apr 15, 2004
Real Networks Helix Universal Server 9.0.x - Denial of Service
Open source ↗
Related CVEs(same CWE)
Same CWE
10 shownCWE-476
Frequently asked(5)
What is CVE-2004-0389?
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Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2004-0389
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