CVE-2021-26431: Microsoft Windows Lock Screen Improper Access Control Authentication Bypass Vulnerability
First published: Tue Aug 10 2021(Updated: )
Windows Recovery Environment Agent Elevation of Privilege Vulnerability
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Windows Server | =20H2 | |
| Microsoft Windows Server | =2004 | |
| Windows 10 | =20H2 | |
| Windows 10 | =20H2 | |
| Windows 10 | =20H2 | |
| Windows 10 | =21H1 | |
| Windows 10 | =21H1 | |
| Windows 10 | =21H1 | |
| Windows 10 | =2004 | |
| Windows 10 | =2004 | |
| Windows 10 | =2004 | |
| Windows 10 | =20h2 | |
| Windows 10 | =21h1 | |
| Windows 10 | =2004 | |
| Microsoft Windows Server 2016 | =20h2 | |
| Microsoft Windows Server 2016 | =2004 | |
| Microsoft Windows Operating System |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-26431?
CVE-2021-26431 is classified as a medium severity vulnerability that allows an elevation of privilege in the Windows Recovery Environment.
How do I fix CVE-2021-26431?
To fix CVE-2021-26431, install the latest security updates provided by Microsoft for affected Windows versions.
Which versions of Windows are affected by CVE-2021-26431?
CVE-2021-26431 affects Windows 10 and Windows Server versions 2004, 20H2, and 21H1.
Can CVE-2021-26431 be exploited remotely?
CVE-2021-26431 cannot be exploited remotely; an attacker must have physical access to the affected system.
What are the potential impacts of CVE-2021-26431?
Exploitation of CVE-2021-26431 could allow an attacker to gain elevated privileges and execute arbitrary code with higher permissions.
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