CVE-2009-0091

critical Microsoft
CVSS v3 Base Score
9.3
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS Score
42.0%
Exploitation probability in 30 days
Top 3% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
M
Confidentiality
C
Integrity
C
Availability
C
Published: October 14, 2009 (6056 days ago)
Last Modified: April 23, 2026
Vendor: Microsoft
Source: NVD

Description

Microsoft .NET Framework 2.0, 2.0 SP1, and 3.5 does not properly enforce a certain type-equality constraint in .NET verifiable code, which allows remote attackers to execute arbitrary code via (1) a crafted XAML browser application (XBAP), (2) a crafted ASP.NET application, or (3) a crafted .NET Framework application, aka "Microsoft .NET Framework Type Verification Vulnerability."

CWE

CWE-94

Affected Products

microsoft windows 2000microsoft .net frameworkmicrosoft windows server 2003microsoft windows server 2008microsoft windows vistamicrosoft windows 7microsoft windows xp

References

🔗 www.us-cert.gov 🔗 docs.microsoft.com 🔗 oval.cisecurity.org 🔗 www.us-cert.gov 🔗 docs.microsoft.com