CVE-2021-27064: 
vulnerability analysis and mitigation

The vulnerability CVE-2021-27064 is a Visual Studio Installer Elevation of Privilege Vulnerability that was identified and assigned on February 10, 2021. This security flaw affects multiple versions of Microsoft Visual Studio, including Visual Studio 2017 (versions 15.0 to 15.9) and Visual Studio 2019 (versions 16.0 to 16.9) (NVD).

The vulnerability has been assigned a CVSS v3.1 Base Score of 7.8 (HIGH) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. This indicates that the vulnerability requires local access, low attack complexity, low privileges, and no user interaction, while potentially impacting confidentiality, integrity, and availability at high levels. Under CVSS v2.0, it received a Base Score of 4.6 (MEDIUM) with the vector (AV:L/AC:L/Au:N/C:P/I:P/A:P) (NVD).

The vulnerability could allow an attacker to gain elevated privileges on affected systems running Microsoft Visual Studio. The high CVSS score indicates that successful exploitation could lead to significant impacts on system confidentiality, integrity, and availability (NVD).

Microsoft has released security patches to address this vulnerability through their security advisory. Users are advised to update their Visual Studio installations to the latest versions that contain the security fixes (Microsoft Advisory).