June 9, 2026—KB5094042 (Monthly Rollup)

June 9, 2026—KB5094042 Monthly Rollup Applies To Windows Server 2012 ESU 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...

KLA91048 SUI vulnerability in Microsoft Products (ESU)

A spoofing vulnerability was found in Microsoft Microsoft Products Extended Security Update. Malicious users can exploit this vulnerability to perform cross-site scripting attack, spoof user interface. Original advisories CVE-2026-42897 Exploitation Public exploits exist for this vulnerability...

April 14, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 (KB5082398)

April 14, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 KB5082398 Applies To .NET Note 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 th...

KLA90926 Multiple vulnerabilities in Microsoft Products (ESU)

Multiple vulnerabilities were found in Microsoft Products Extended Security Update. Malicious users can exploit these vulnerabilities to gain privileges, execute arbitrary code, bypass security restrictions, obtain sensitive information, cause denial of service, spoof user interface. Below is a...

February 10, 2026—KB5075970 (Monthly Rollup)

February 10, 2026—KB5075970 Monthly Rollup Applies To Windows Server 2012 R2 ESU 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...

Description of the security update for Microsoft Exchange Server 2019 CU15: February 10, 2026 (KB5074993)

Description of the security update for Microsoft Exchange Server 2019 CU15: February 10, 2026 KB5074993 Applies To Exchange Server 2019 This security update resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common Vulnerabilities a...

Description of the security update for Microsoft Exchange Server 2016 CU23: February 10, 2026 (KB5074995)

Description of the security update for Microsoft Exchange Server 2016 CU23: February 10, 2026 KB5074995 Applies To Exchange Server 2016 This security update resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common Vulnerabilities a...

December 18, 2025—KB5074980 (Monthly Rollup) Out-of-band

December 18, 2025—KB5074980 Monthly Rollup Out-of-band Applies To Windows Server 2012 ESU 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...

December 18, 2025—KB5074978 (Monthly Rollup) Out-of-band

December 18, 2025—KB5074978 Monthly Rollup Out-of-band Applies To Windows Server 2012 R2 ESU 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,...

November 11, 2025—KB5068907 (Monthly Rollup)

November 11, 2025—KB5068907 Monthly Rollup Applies To Windows Server 2012 ESU 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 a...

Description of the security update for Microsoft Exchange Server 2019 CU14: December 9, 2025 (KB5071874)

Description of the security update for Microsoft Exchange Server 2019 CU14: December 9, 2025 KB5071874 Applies To Exchange Server 2019 Original article content This security update resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following...

Description of the security update for Microsoft Exchange Server 2016 CU23: December 9, 2025 (KB5071873)

Description of the security update for Microsoft Exchange Server 2016 CU23: December 9, 2025 KB5071873 Applies To Exchange Server 2016 Original article content This security update resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following...

KLA90988 Multiple vulnerabilities in Microsoft Products (ESU)

Multiple vulnerabilities were found in Microsoft Products Extended Security Update. Malicious users can exploit these vulnerabilities to bypass security restrictions, gain privileges, cause denial of service. Below is a complete list of vulnerabilities: 1. Heap buffer overflow vulnerability can b...

October 14, 2025—KB5066875 (Monthly Rollup)

October 14, 2025—KB5066875 Monthly Rollup Applies To Windows Server 2012 ESU 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 al...

October 14, 2025—KB5066873 (Monthly Rollup)

October 14, 2025—KB5066873 Monthly Rollup Applies To Windows Server 2012 R2 ESU 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...

October 23, 2025—KB5070887 (Monthly Rollup) Out-of-band

October 23, 2025—KB5070887 Monthly Rollup Out-of-band Applies To Windows Server 2012 ESU 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...

KLA90884 PE vulnerability in Microsoft Products (ESU)

An elevation of privilege vulnerability was found in Microsoft Products Extended Security Update. Malicious users can exploit this vulnerability to gain privileges. Original advisories CVE-2025-59220 Exploitation Malware exists for this vulnerability. Usually such malware is classified as Exploit...

September 9, 2025—KB5065509 (Monthly Rollup)

September 9, 2025—KB5065509 Monthly Rollup Applies To Windows Server 2012 ESU 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 a...

September 9, 2025—KB5065507 (Monthly Rollup)

September 9, 2025—KB5065507 Monthly Rollup Applies To Windows Server 2012 R2 ESU 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...

July 8, 2025—KB5062592 (Monthly Rollup)

July 8, 2025—KB5062592 Monthly Rollup Applies To Windows Server 2012 ESU Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain personal and business devices to boot...