Microsoft Patch Tuesday: Complete Details of November 2021 Update That Fixed 55 Bugs

Microsoft Patch Tuesday: Complete Details of November 2021 Update That Fixed 55 Bugs
Microsoft has released its latest update to fix 55 bugs, six of which are critical while 49 are rated as important. Unfortunately, patches for Microsoft Office 2019 of Mac and Microsoft Office LTSC for Mac 2021 are not included in this update. Photo : Clint Patterson/UNSPLASH

Microsoft has released its latest update to fix 55 bugs, six of which are critical while 49 are rated as important. Unfortunately, patches for Microsoft Office 2019 of Mac and Microsoft Office LTSC for Mac 2021 are not included in this update.

Microsoft Patch Tuesday November 2021: Complete Details

According to ZDNet, the first Microsoft patch Tuesday for this month has fixed six critical vulnerabilities, 15 remote code execution (RCE) bugs, information leaks, and elevation of privilege (EoP) security flaws, as well as issues that could lead to spoofing and tampering.

With regards to the percentage count by impact, Tenable stated that the EoP issues made up more than 36 percent of the vulnerabilities patched this month, while the RCE is approximately 27 percent.

Microsoft stated that EoP occurs when an attacker is granted authorized permissions beyond those originally provided. An attacker with read-only access, for instance, can elevate the set to include read and write permissions.

Additionally, RCE is a type of cyber-attack in which an attacker may remotely execute commands on another computer, per Bug Crowd. It is caused by harmful malware that the host has downloaded, and it can occur independently of the device's geographic location.

Furthermore, Tenable added that this month's Microsoft patch includes Microsoft Azure, the Chromium-based Edge browser, Microsoft Office (including associated applications such as Excel, Word, and SharePoint), Visual Studio, Exchange Server, Windows Kernel and Windows Defender.

On the other hand, ZDNet also shared in detail some of the most interesting issues fixed in this month's Microsoft Patch Tuesday, which are all considered critical.

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What Is Microsoft Patch Tuesday?

For those who are not familiar with Microsoft's patch Tuesday, Tech Republic stated that the tech giant invented a security update schedule in 2003 allowing network administrators to develop compatibility testing and deployment strategies into their monthly schedules. The goal was to keep administrators from having to cope up with updates that were provided on an irregular basis.

The Tech Republic furthered that there are two important Tuesdays on Microsoft's update schedule.

The first patch Tuesday occurs every second Tuesday of every month, in which Microsoft publishes security upgrades for Windows (desktop and server editions), Office, and other Microsoft applications. Meanwhile, the second important Tuesday occurs every fourth Tuesday of each month, which is for non-security-related updates.

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