CVE-2021-43240 : What You Need to Know
Learn about the impact and mitigation steps for CVE-2021-43240, an NTFS elevation of privilege vulnerability affecting various Microsoft Windows versions. Stay secure with the latest updates.
This CVE involves an elevation of privilege vulnerability in NTFS that affects various Microsoft Windows versions.
Understanding CVE-2021-43240
What is CVE-2021-43240?
The CVE-2021-43240 is an elevation of privilege vulnerability in NTFS, impacting multiple Windows versions.
The Impact of CVE-2021-43240
The vulnerability has a CVSS base score of 7.8, indicating a high severity level. Attackers could exploit this to elevate privileges on affected systems.
Technical Details of CVE-2021-43240
Vulnerability Description
The NTFS Set Short Name Elevation of Privilege Vulnerability allows attackers to escalate privileges on Windows systems.
Affected Systems and Versions
- Windows 10 Version 1909: 10.0.18363.1977
- Windows 10 Version 21H1: 10.0.19043.1415
- Windows Server 2022: 10.0.20348.405
- Windows 10 Version 2004: 10.0.19041.1415
- Windows Server version 2004: 10.0.19041.1415
- Windows 10 Version 20H2: 10.0.19042.1415
- Windows Server version 20H2: 10.0.19042.1415
- Windows 11 Version 21H2: 10.0.22000.376
- Windows 10 Version 21H2: 10.0.19044.1415
Exploitation Mechanism
The vulnerability could be exploited by malicious actors to gain elevated privileges on the affected Windows systems.
Mitigation and Prevention
Immediate Steps to Take
- Apply the latest security updates from Microsoft promptly.
- Implement the principle of least privilege to restrict user privileges.
Long-Term Security Practices
- Regularly monitor for unusual activities on systems.
- Conduct security training for users on identifying and reporting potential threats.
Patching and Updates
- Keep all Windows systems up to date with security patches to mitigate the risk of exploitation.