CVE-2021-41379

CVE-2021-41379 is a medium-severity (CVSS 5.5) vulnerability in Microsoft Windows. CISA added it to the Known Exploited Vulnerabilities catalog on March 3, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by March 17, 2022. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

Windows Installer Elevation of Privilege Vulnerability

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-41379
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41379
• https://www.zerodayinitiative.com/advisories/ZDI-21-1308/
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-41379