Offline updating of microsoft security essentials
Product documentation also recommends that products are configured for automatic updating.Best practices recommend that customers regularly verify whether software distribution, such as the automatic deployment of Microsoft Malware Protection Engine updates and malware definitions, is working as expected in their environment.
In addition, exploitation of the vulnerability could occur when the system is scanned using an affected version of the Malicious Software Removal Tool (MSRT).
Why is typically no action required to install this update?
In response to a constantly changing threat landscape, Microsoft frequently updates malware definitions and the Microsoft Malware Protection Engine.
An attacker who successfully exploited this vulnerability could prevent the Microsoft Malware Protection Engine from monitoring affected systems until the specially crafted file is manually removed and the service is restarted.
The Microsoft Malware Protection Engine ships with several Microsoft antimalware products.
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For more information about what these ratings mean, and how they are determined, please see Microsoft Exploitability Index. Exploitation of this vulnerability may cause the operating system or an application to become permanently unresponsive until it is restarted manually.