CVE-2021-41378: 
vulnerability analysis and mitigation

CVE-2021-41378 is a Windows NTFS Remote Code Execution Vulnerability that was disclosed on November 9, 2021. The vulnerability affects multiple versions of Microsoft Windows including Windows 10 (versions 1809, 1909, 2004, 20H2, 21H1), Windows 11, and Windows Server installations (NVD).

The vulnerability has received a CVSS v3.1 base score of 8.8 (HIGH) from NIST with a vector string of CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, while Microsoft assessed it with a score of 7.8 (HIGH) and vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. The CVSS v2.0 base score is 6.5 (MEDIUM) with a vector of (AV:N/AC:L/Au:S/C:P/I:P/A:P) (NVD).

This vulnerability could allow an attacker to execute remote code on affected systems, potentially gaining the same level of privileges as the compromised user. The high CVSS scores indicate that successful exploitation could lead to significant system compromise with potential for complete loss of confidentiality, integrity, and availability (NVD).

Microsoft has released security updates to address this vulnerability. The fixes are available through various KB updates including KB5007186 for Windows 10 versions 2004, 20H2, and 21H1, KB5007189 for version 1909, KB5007206 for version 1809, KB5007215 for Windows 11, and KB5007205 for Windows Server 2022 (Rapid7).