The Messenger Service for Windows NT through Server 2003 does not properly verify the length of the message, which allows remote attackers to execute arbitrary code via a buffer overflow attack.
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The Messenger Service for Windows NT through Server 2003 does not properly verify the length of the message, which allows remote attackers to execute arbitrary code via a buffer overflow attack.
November 17, 2003
April 16, 2026
Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.
Working exploit code is in the public domain (4 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
Microsoft Messenger (Linux) - Denial of Service (MS03-043)
Open source ↗Microsoft Windows Messenger Service (French) - Remote (MS03-043)
Open source ↗Microsoft Windows XP/2000 - Messenger Service Buffer Overrun (MS03-043)
Open source ↗Microsoft Windows Messenger Service - Denial of Service (MS03-043)
Open source ↗See which npm, PyPI, Go, and Maven packages are affected by CVE-2003-0717
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