CVE-2021-1640: Microsoft Windows Print Spooler Time-Of-Check Time-Of-Use Denial-of-Service Vulnerability
First published: Tue Mar 09 2021(Updated: )
This vulnerability allows local attackers to create a denial-of-service condition 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 the Print Spooler service. By creating a directory junction, an attacker can abuse the Print Spooler service to delete a file. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Windows Server | =2004 | |
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows 7 | ||
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows Server | =20H2 | |
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Server | =1909 | |
| Microsoft Windows 7 | ||
| Microsoft Windows Server 2008 R2 | ||
| 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 | ||
| 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 | ||
| 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 | |
| Microsoft Windows Operating System |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-1640?
CVE-2021-1640 has a severity rating of important according to Microsoft, indicating a potential denial-of-service vulnerability.
How do I fix CVE-2021-1640?
To fix CVE-2021-1640, install the relevant security updates provided by Microsoft for your affected version of Windows.
What versions of Windows are affected by CVE-2021-1640?
CVE-2021-1640 affects various versions of Microsoft Windows, including Windows 10, Windows Server, and Windows 7.
Can CVE-2021-1640 be exploited remotely?
No, CVE-2021-1640 requires local access for exploitation, as the attacker must execute low-privileged code on the target system.
What is the impact of CVE-2021-1640 on my system?
CVE-2021-1640 can lead to a denial-of-service condition, potentially making the system unresponsive.
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