Unrated severityNVD Advisory· Published Dec 9, 2009· Updated Jun 16, 2026
CVE-2009-2505
CVE-2009-2505
Description
The Internet Authentication Service (IAS) in Microsoft Windows Vista SP2 and Server 2008 SP2 does not properly validate MS-CHAP v2 Protected Extensible Authentication Protocol (PEAP) authentication requests, which allows remote attackers to execute arbitrary code via crafted structures in a malformed request, aka "Internet Authentication Service Memory Corruption Vulnerability."
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
7cpe:2.3:o:microsoft:windows_server_2008:*:sp2:itanium:*:*:*:*:*+ 3 more
- cpe:2.3:o:microsoft:windows_server_2008:*:sp2:itanium:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2008:sp2:x32:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2008:sp2:x64:*:*:*:*:*:*
- (no CPE)range: SP2
- Range: SP2
Patches
Vulnerability mechanics
References
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