Severity Rating: Important
Revision Note: V1.1 (April 16, 2013): Bulletin revised to announce a detection change in the 2781197 package to correct a reoffering issue. This is a detection change only. Customers who have already successfully updated their systems do not need to take any action.
Summary: This security update resolves a privately reported vulnerability in the Microsoft Antimalware Client. The vulnerability could allow elevation of privilege due to the pathnames used by the Microsoft Antimalware Client. An attacker who successfully exploited this vulnerability could execute arbitrary code and take complete control of an affected system. The attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. An attacker must have valid logon credentials to exploit this vulnerability. The vulnerability could not be exploited by anonymous users.
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