CVE-2021-26862: Microsoft Windows Installer Service Directory Junction Privilege Escalation Vulnerability
First published: Tue Mar 09 2021(Updated: )
Windows Installer Elevation of Privilege Vulnerability
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows Server | =2004 | |
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows 7 | ||
| Microsoft Windows 7 | ||
| Microsoft Windows Server | =1909 | |
| Microsoft Windows Server | =20H2 | |
| Microsoft Windows RT | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows 8.1 | ||
| Microsoft Windows 8.1 | ||
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2019 | ||
| Windows 10 | =20H2 | |
| Windows 10 | =20H2 | |
| Windows 10 | =20H2 | |
| Windows 10 | =1803 | |
| Windows 10 | =1809 | |
| Windows 10 | =1809 | |
| Windows 10 | =1809 | |
| Windows 10 | =1607 | |
| Windows 10 | =1607 | |
| Windows 10 | =1909 | |
| Windows 10 | =1909 | |
| Windows 10 | =1909 | |
| Windows 10 | ||
| Windows 10 | =1803 | |
| Windows 10 | =1803 | |
| Windows 10 | ||
| Windows 10 | =2004 | |
| Windows 10 | =2004 | |
| Windows 10 | =2004 | |
| Windows 10 | ||
| Windows 10 | =20h2 | |
| Windows 10 | =1607 | |
| Windows 10 | =1803 | |
| Windows 10 | =1809 | |
| Windows 10 | =1909 | |
| Windows 10 | =2004 | |
| Microsoft Windows 7 | =sp1 | |
| Microsoft Windows | ||
| Microsoft Windows RT | ||
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =r2-sp1 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2016 | =20h2 | |
| Microsoft Windows Server 2016 | =1909 | |
| Microsoft Windows Server 2016 | =2004 | |
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Operating System |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-26862?
CVE-2021-26862 is rated as important, allowing local attackers to escalate privileges on affected installations.
How do I fix CVE-2021-26862?
You can fix CVE-2021-26862 by applying the appropriate security updates provided by Microsoft.
Which versions of Windows are affected by CVE-2021-26862?
CVE-2021-26862 affects multiple versions of Windows, including Windows 7, Windows 10, and various Windows Server editions.
Can CVE-2021-26862 be exploited remotely?
No, CVE-2021-26862 requires local access to the system to exploit the vulnerability.
What type of vulnerability is CVE-2021-26862?
CVE-2021-26862 is classified as an elevation of privilege vulnerability in the Windows Installer.
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