# MA-805.052021: MyCERT Advisory - Microsoft May 2021 Security Updates

**Date:** 16 May 2021  
**Source:** https://www.mycert.org.my/portal/advisory?id=MA-805.052021  
**Advisory ID:** MA-805.052021

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**1.0 Introduction**
Microsoft has released updates to address multiple vulnerabilities in Microsoft software.
**2.0 Impact**
A remote attacker could exploit some of these vulnerabilities to take control of an affected system.
**3.0 Affected Products**
- .NET Core & Visual Studio
- HTTP.sys
- Internet Explorer
- Microsoft Accessibility Insights for Web
- Microsoft Bluetooth Driver
- Microsoft Dynamics Finance & Operations
- Microsoft Edge (Chromium-based)
- Microsoft Exchange Server
- Microsoft Graphics Component
- Microsoft Office
- Microsoft Office Access
- Microsoft Office Excel
- Microsoft Office SharePoint
- Microsoft Office Word
- Microsoft Windows Codecs Library
- Microsoft Windows IrDA
- Open Source Software
- Role: Hyper-V
- Skype for Business and Microsoft Lync
- Visual Studio
- Visual Studio Code
- Windows Container Isolation FS Filter Driver
- Windows Container Manager Service
- Windows Cryptographic Services
- Windows CSC Service
- Windows Desktop Bridge
- Windows OLE
- Windows Projected File System FS Filter
- Windows RDP Client
- Windows SMB
- Windows SSDP Service
- Windows WalletService
- Windows Wireless Networking
**4.0 Recommendations**
Users and administrators are recommended to review the below URLs and perform necessary update. Kindly refer to the below URL:
<https://msrc.microsoft.com/update-guide/deployments>
<https://msrc.microsoft.com/update-guide/releaseNote/2021-May>
Generally, MyCERT advises the users of this devices to be updated with the latest security announcements by the vendor and follow best practice security policies to determine which updates should be applied.
For further inquiries, please contact MyCERT through the following channels:
E-mail: cyber999[at]cybersecurity.my
Phone: 1-300-88-2999 (monitored during business hours)
Fax: +603 - 8008 7000 (Office Hours)
Mobile: +60 19 2665850 (24x7 call incident reporting)
SMS: CYBER999 REPORT EMAIL COMPLAINT to 15888
Business Hours: Mon - Fri 09:00 -18:00 MYT
Web: <https://www.mycert.org.my>
Twitter: <https://twitter.com/mycert>
Facebook: <https://www.facebook.com/mycert.org.my>
**5.0    References**
<https://msrc.microsoft.com/update-guide/deployments>
<https://msrc.microsoft.com/update-guide/releaseNote/2021-May>