by Nadia Meichtry

On Patch Tuesday in May 2021, Microsoft fixed a total of 55 vulnerabilities in various Windows versions and applications. [1] Patch Tuesday occurs on the second Tuesday of each month. On this day, Microsoft releases patches or updates for their systems and products. [2]

Microsoft has classified CVE-2021-31166 as particularly dangerous. This remote code execution (RCE) vulnerability has a CVSS (Common Vulnerability Scoring System) score of 9.8 out of 10, affecting Windows 10 versions 2004 and 20H2 and Windows Server versions 2004 and 20H2. [3] A proof of concept for this vulnerability was published on 16 May 2021. [4]
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