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<div><p><strong>Serial number: </strong>AV26-456<br /><strong>Date: </strong>May 12, 2026</p>
On May 12, 2026, Microsoft published security advisories to address vulnerabilities in multiple products. Included were critical updates for the following products:
- .NET 10.0 installed on Linux
- .NET 10.0 installed on Mac OS
- .NET 10.0 installed on Windows
- .NET 8.0 installed on Linux
- .NET 8.0 installed on Mac OS
- .NET 8.0 installed on Windows
- .NET 9.0 installed on Linux
- .NET 9.0 installed on Mac OS
- .NET 9.0 installed on Windows
- Azure AI Foundry
- Azure Cloud Shell
- Azure Connected Machine Agent
- Azure DevOps
- Azure Logic Apps
- Azure Machine Learning
- Azure Managed Instance for Apache Cassandra
- Azure Monitor Action Group notification system
- Azure Monitor Agent
- Azure Monitor Agent Metrics Extension
- Azure SDK for Java
- Copilot Chat (Microsoft Edge)
- Dynamics 365 Customer Insights
- M365 Copilot for Desktop
- Microsoft .NET Framework 3.5
- Microsoft .NET Framework 3.5 AND 4.7.2
- Microsoft .NET Framework 3.5 AND 4.8
- Microsoft .NET Framework 3.5 AND 4.8.1
- Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2
- Microsoft .NET Framework 4.8
- Microsoft 365
- Microsoft 365 Copilot for Android
- Microsoft 365 Copilot's Business Chat
- Microsoft Confluence SAML SSO plugin
- Microsoft Data Formulator
- Microsoft Dynamics 365
- Microsoft Dynamics 365 Business Central
- Microsoft Edge (Chromium-based)
- Microsoft Enterprise Security Token Service (ESTS)
- Microsoft Excel 2016
- Microsoft Excel for Android
- Microsoft JIRA SAML SSO plugin
- Microsoft Office 2016
- Microsoft Office 2019
- Microsoft Office LTSC 2021
- Microsoft Office LTSC 2024
- Microsoft Office LTSC for Mac 2021
- Microsoft Office LTSC for Mac 2024
- Microsoft Office for Android
- Microsoft Outlook for iOS
- Microsoft Partner Center
- Microsoft PowerPoint for Android
- Microsoft SQL Server 2016
- Microsoft SQL Server 2017
- Microsoft SQL Server 2019
- Microsoft SQL Server 2022
- Microsoft SQL Server 2025
- Microsoft SharePoint Enterprise Server 2016
- Microsoft SharePoint Server 2019
- Microsoft SharePoint Server Subscription Edition
- Microsoft Teams
- Microsoft Teams for Android
- Microsoft Visual Studio 2017
- Microsoft Visual Studio 2019
- Microsoft Visual Studio 2022
- Microsoft Visual Studio 2026
- Microsoft Word 2016
- Microsoft Word for Android
- Office Online Server
- Power Automate for Desktop
- Visual Studio Code
- Visual Studio Code - Live Preview extension
- Windows 10
- Windows 11
- Windows Admin Center
- Windows Admin Center in Azure Portal
- Windows Server 2012
- Windows Server 2016
- Windows Server 2019
- Windows Server 2025
The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.
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Article Link: Microsoft security advisory – May 2026 monthly rollup (AV26-456) - Canadian Centre for Cyber Security