May 12, 2026—KB5087471 (Monthly Rollup)

May 12, 2026—KB5087471 Monthly Rollup Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012 R2. For a successful installation, please make sure all Subset of endpoints for ESU only a...

May 12, 2026—Hotpatch KB5087423 (OS Build 26100.32772)

May 12, 2026—Hotpatch KB5087423 OS Build 26100.32772 This update applies to Windows Server 2025 Datacenter & Standard machines connected to Azure Arc. To learn more about differences between security updates, optional non-security preview updates, out-of-band OOB updates, and continuous innovatio...

May 12, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 R2 (KB5087049)

May 12, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 R2 KB5087049 Applies to: Microsoft .NET Framework 3.5 Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Window...

May 12, 2026—KB5087470 (Monthly Rollup)

May 12, 2026—KB5087470 Monthly Rollup Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012. For a successful installation, please make sure all Subset of endpoints for ESU only are...

April 14, 2026—KB5082127 (Monthly Rollup)

April 14, 2026—KB5082127 Monthly Rollup Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012. For a successful installation, please make sure all Subset of endpoints for ESU only ar...

April 14, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 R2 (KB5082406)

April 14, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 R2 KB5082406 Applies to: Microsoft .NET Framework 3.5 Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running...

April 14, 2026—KB5082126 (Monthly Rollup)

April 14, 2026—KB5082126 Monthly Rollup Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012 R2. For a successful installation, please make sure all Subset of endpoints for ESU only...

April 14, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 (KB5082403)

April 14, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 KB5082403 Applies to: Microsoft .NET Framework 4.8 Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows...

CVE-2026-26141

Improper authentication in Azure Arc allows an authorized attacker to elevate privileges locally...

EUVD-2026-10700

Improper authentication in Azure Arc allows an authorized attacker to elevate privileges locally...

CVE-2026-26141

Improper authentication in Azure Arc allows an authorized attacker to elevate privileges locally...

CVE-2026-26141

Improper authentication in Azure Arc allows an authorized attacker to elevate privileges locally...

CVE-2026-26141

Improper authentication in Azure Arc allows an authorized attacker to elevate privileges locally...

March 10, 2026—KB5078775 (Monthly Rollup)

March 10, 2026—KB5078775 Monthly Rollup Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012. For a successful installation, please make sure all Subset of endpoints for ESU only ar...

March 10, 2026—Hotpatch KB5078736 (OS Build 26100.32463)

March 10, 2026—Hotpatch KB5078736 OS Build 26100.32463 This update applies to Windows Server 2025 Datacenter & Standard machines connected to Azure Arc. To learn more about differences between security updates, optional non-security preview updates, out-of-band OOB updates, and continuous...

March 10, 2026—KB5078774 (Monthly Rollup)

March 10, 2026—KB5078774 Monthly Rollup Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012 R2. For a successful installation, please make sure all Subset of endpoints for ESU only...

PT-2026-24336

Name of the Vulnerable Software and Affected Versions Azure Arc affected versions not specified Description An improper authentication issue exists in Azure Arc that could allow an authorized attacker to elevate privileges locally. Microsoft has disclosed three elevation of privilege flaws in Azu...

Microsoft Azure Arc 授权问题漏洞

Microsoft Azure Arc is a storage system provided by the American company Microsoft. It allows for the extension of the Azure platform into your environment. There are authorization-related vulnerabilities in Microsoft Azure Arc. Attackers can exploit these vulnerabilities to gain higher levels of...

Microsoft Azure Arc Access Control Error Vulnerability

Microsoft Azure Arc is a storage system from Microsoft USA. that extends the Azure platform into your environment. Microsoft Azure Arc has an Access Control Error vulnerability that can be exploited by an attacker to elevate privileges...

February 10, 2026—Hotpatch KB5075942 (OS Build 26100.32313)

February 10, 2026—Hotpatch KB5075942 OS Build 26100.32313 This update applies to Windows Server 2025 Datacenter & Standard machines connected to Azure Arc. To learn more about differences between security updates, optional non-security preview updates, out-of-band OOB updates, and continuous...