CVE-2003-0349

Status: ModifiedHigh (7.5)—💥 Exploit

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

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Base score: 7.5

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 80%
Percentile among all scored CVEs: 100
Score date: 10/7/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Metasploit module (reliable, widely available exploit) · MS03-022 Microsoft IIS ISAPI nsiislog.dll ISAPI POST Overflow
Published on Exploit-DB · Microsoft IIS - ISAPI 'nsiislog.dll' ISAPI POST Overflow (MS03-022) (Metasploit) (7/25/2010)
Published on Exploit-DB · Microsoft Windows Media Services - Remote (MS03-022) (7/1/2003)
Published on Exploit-DB · Microsoft Windows NT 4.0/2000 - Media Services 'nsiislog.dll' Remote Buffer Overflow (6/25/2003)

Affected technologies (1)

Microsoft — Windows 2000

CWEs

NVD-CWE-Other

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2003-0349",
  "cveTags": [],
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          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": true,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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  "affected": [
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  "published": "2003-07-24T04:00:00.000",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
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      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Desbordamiento de búfer en el componente de secuenciamiento (streaming) de medios para registrar peticiones de multidifusión en la librería ISAPI de la capacidad de registro (logging) de Microsoft Windows Media Services (nsiislog.dll), como el instalado en IIS 5.9, permite a atacantes remotos ejecutar código arbitrario mediante una petición POST larga a nsiislog.dll."
    }
  ],
  "lastModified": "2026-06-16T22:02:02.713",
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}