CVE-2021-31187: Microsoft Windows WalletService Directory Junction Privilege Escalation Vulnerability

First published: Tue May 11 2021(Updated: )

This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within WalletService. By creating a directory junction, an attacker can abuse the service to create a file in an arbitrary location. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of SYSTEM.

Credit: secure@microsoft.com secure@microsoft.com

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