http://www.microsoft.com/technet/security/bulletin/MS03-041.asp

Vulnerability in Authenticode Verification Could Allow Remote Code Execution
(823182)
Issued: October 15, 2003

Version Number: 1.0

Impact of Vulnerability: Remote Code Execution

Maximum Severity Rating: Critical

Recommendation: Customers should apply the patch immediately

Patch Replacement: None

Caveats: None