CVE-2003-0349

NONECVSS 0.09.0▲
EchelonGraph scoreLOW confidence

Score elevated to 9.0 because EPSS predicts 88% probability of exploitation within the next 30 days (top 0.5% of all CVEs). Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss
Weaponized
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 83%
CISA-KEV: Not listedEPSS: 83%CVSS: —Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Buffer overflow in the streaming media component for logging multicast requests in the ISAPI for the logging capability of Microsoft Windows Media Services (nsiislog.dll), as installed in IIS 5.0, allows remote attackers to execute arbitrary code via a large POST request to nsiislog.dll.

CVSS v3
—
EG Score
9.0(low)
EPSS
99.6%
KEV
Not listed

Published

July 24, 2003

Last Modified

June 16, 2026

References (14)

Data Freshness Timeline

(refreshed 2× in last 7d / 10× 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.

  1. 2026-07-11 08:22 UTCEPSS rescore
  2. 2026-07-11 08:22 UTCEPSS rescore
  3. 2026-07-04 06:26 UTCEPSS rescore
  4. 2026-06-27 03:04 UTCEPSS rescore
  5. 2026-06-23 21:29 UTCEPSS rescore
  6. 2026-06-21 14:52 UTCEPSS rescore
  7. 2026-06-21 01:56 UTCEPSS rescore
  8. 2026-06-16 17:49 UTCEPSS rescore
  9. 2026-06-16 17:49 UTCEPSS rescore
  10. 2026-06-15 17:43 UTCEPSS rescore
  11. 2026-06-13 22:56 UTCEPSS rescore
  12. 2026-06-12 23:08 UTCEPSS rescore
  13. 2026-06-10 22:13 UTCEPSS rescore
  14. 2026-06-10 13:17 UTCEPSS rescore
  15. 2026-06-08 14:13 UTCEPSS rescore
  16. 2026-06-07 15:21 UTCEPSS rescore
  17. 2026-06-05 22:43 UTCEPSS rescore
  18. 2026-06-05 22:43 UTCEPSS rescore
  19. 2026-05-31 17:28 UTCEG score recompute
  20. 2026-05-31 17:28 UTCGHSA enrichment
  21. 2026-05-28 13:42 UTCEPSS rescore
  22. 2026-05-28 13:42 UTCEPSS rescore
  23. 2026-05-28 13:42 UTCEPSS rescore
  24. 2026-05-26 07:16 UTCEPSS rescore
  25. 2026-05-26 07:16 UTCEPSS rescore
Show 5 more
  1. 2026-05-24 16:42 UTCEPSS rescore
  2. 2026-05-22 21:15 UTCEPSS rescore
  3. 2026-05-20 22:36 UTCEPSS rescore
  4. 2026-05-18 21:29 UTCEPSS rescore
  5. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(4 references)

Working exploit code is in the public domain (1 Metasploit module) (3 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-16355✓ verified
    First seen Jul 25, 2010

    Microsoft IIS - ISAPI 'nsiislog.dll' ISAPI POST Overflow (MS03-022) (Metasploit)

    Open source ↗
  • Exploit-DBEDB-48✓ verified
    First seen Jul 1, 2003

    Microsoft Windows Media Services - Remote (MS03-022)

    Open source ↗
  • Exploit-DBEDB-22837✓ verified
    First seen Jun 25, 2003

    Microsoft Windows NT 4.0/2000 - Media Services 'nsiislog.dll' Remote Buffer Overflow

    Open source ↗
  • Metasploitexploit/windows/isapi/ms03_022_nsiislog_post✓ verified
    First seen Jun 25, 2003

    MS03-022 Microsoft IIS ISAPI nsiislog.dll ISAPI POST Overflow

    Open source ↗

Frequently asked(4)

What is CVE-2003-0349?
CVE-2003-0349 is a none vulnerability published on July 24, 2003. Buffer overflow in the streaming media component for logging multicast requests in the ISAPI for the logging capability of Microsoft Windows Media Services (nsiislog.dll), as installed in IIS 5.0, allows remote attackers to execute arbitrary code via a large POST request to nsiislog.dll.
When was CVE-2003-0349 disclosed?
CVE-2003-0349 was first published in the National Vulnerability Database on July 24, 2003, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2003-0349 actively exploited?
CVE-2003-0349 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2003-0349?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2003-0349, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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