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

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

• collector/nvd-index
• collector/nvd-api
• collector/msrc-cve
• agent/author
• agent/type
• agent/first-publish-date
• agent/softwarecombine
• collector/mitre-cve
• source/MITRE
• agent/remedy
• agent/severity
• agent/last-modified-date
• agent/weakness
• agent/title
• agent/references
• agent/description
• collector/zdi-advisory
• source/ZDI
• alias/ZDI-21-571
• alias/ZDI-CAN-12792
• alias/CVE-2021-31187
• agent/software-canonical-lookup
• agent/event
• source/Microsoft
• agent/tags
• agent/trending
• vendor/microsoft
• canonical/microsoft windows 10
• version/microsoft windows 10/20h2
• version/microsoft windows 10/1607
• version/microsoft windows 10/1803
• version/microsoft windows 10/1809
• version/microsoft windows 10/1909
• version/microsoft windows 10/2004
• canonical/microsoft windows