Security News > 2021 > May > Latest Microsoft Windows Updates Patch Dozens of Security Flaws

Microsoft on Tuesday rolled out its scheduled monthly security update with patches for 55 security flaws affecting Windows, Exchange Server, Internet Explorer, Office, Hyper-V, Visual Studio, and Skype for Business.

Another vulnerability of note is a remote code execution flaw in Hyper-V, which also scores the highest severity among all flaws patched this month with a CVSS rating of 9.9.

"It is possible to read from a memory mapped device register corresponding to a hardware device attached to the Hyper-V host which may trigger additional, hardware device specific side effects that could compromise the Hyper-V host's security," the Windows maker noted.

The Patch Tuesday update addresses a scripting engine memory corruption flaw in Internet Explorer and four weaknesses in Microsoft Exchange Server, marking the third consecutive month Microsoft has shipped fixes for the product since ProxyLogon exploits came to light in March -.

Elsewhere, the update addresses a slew of privilege escalation bugs in Windows Container Manager Service, an information disclosure vulnerability in Windows Wireless Networking, and several remote code execution flaws in Microsoft Office, Microsoft SharePoint Server, Skype for Business, and Lync, Visual Studio, and Windows Media Foundation Core.

To install the latest security updates, Windows users can head to Start > Settings > Update & Security > Windows Update, or by selecting Check for Windows updates.

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