CVE-2009-2505

CriticalCVSS 10.0/10Last modified Jun 16, 2026

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."

Metrics

CVSS 2.0 10.0/10AV:N/AC:L/Au:N/C:C/I:C/A:C

Weakness enumeration

CWE-287

Affected software

No affected versions have been published.

Timeline

Published
Dec 9, 2009
Last modified
Jun 16, 2026
NVD status
Modified

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CVE-2009-2505: Critical severity, CVSS 10.0 | Vulnix