October 13, 2026-KB5127696 Cumulative Update for .NET Framework 3.5 for Windows 11, version 26H1

October 13, 2026-KB5127696 Cumulative Update for .NET Framework 3.5 for Windows 11, version 26H1 Applies To .NET Note Release Date: October 13, 2026 Version: .NET Framework 3.5 The October 13, 2026 update for Windows 11, version 26H1 includes security and cumulative reliability improvements in .N...

October 13, 2026-KB5127694 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11 26H2

October 13, 2026-KB5127694 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11 26H2 Applies To .NET Note Release date: October 13, 2026 Version: .NET Framework 3.5 and 4.8.1 The October 13, 2026 update for Windows 11 26H2 includes security and cumulative reliability improvements in...

October 13, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 (KB5127667)

October 13, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 KB5127667 Applies To .NET Note Applies to: Microsoft .NET Framework 4.6.2 Microsoft .NET Framework 4.7 Microsoft .NET Framework 4.7.1 Microsoft .NET Framework 4.7.2 Important The...

July 14, 2026—KB5101650 (OS Builds 26200.8875 and 26100.8875)

July 14, 2026—KB5101650 OS Builds 26200.8875 and 26100.8875 Applies To Windows 11 version 25H2, all editions Windows 11 version 24H2, all editions Want a quick overview?: Watch the Windows 11 release note video for this update. --- Announcements and messages This section provides key notification...

October 13, 2026-KB5127683 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 and Windows 10 Version 22H2

October 13, 2026-KB5127683 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 and Windows 10 Version 22H2 Applies To .NET Note Release Date: October 13, 2026 Version: .NET Framework 3.5 and 4.8 The October 13, 2026 update for Windows 10 Version 21H2 and Windows 10 Versio...

July 14, 2026—KB5099414 (OS Build 22631.7376)

July 14, 2026—KB5099414 OS Build 22631.7376 Applies To Windows 11 version 23H2, all editions This cumulative update for Windows 11, version 23H2 KB5099414, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the...

July 14, 2026—KB5099538 (OS Build 17763.9020)

July 14, 2026—KB5099538 OS Build 17763.9020 Applies To Windows Server 2019 Win 10 Ent LTSC 2019 Windows Secure Boot certificate expiration --- Important Secure Boot certificates used by most Windows devices were set to expire starting in June 2026. Microsoft has been updating these certificates o...

July 14, 2026—KB5099536 (OS Build 26100.33158)

July 14, 2026—KB5099536 OS Build 26100.33158 Applies To Windows Server 2025, all editions This cumulative update for Windows Server 2025 KB5099536, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the Windows...

July 14, 2026—KB5099540 (OS Build 20348.5386)

July 14, 2026—KB5099540 OS Build 20348.5386 Applies To Windows Server 2022 This cumulative update for Windows Server 2022 KB5099540, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the Windows release health...

July 14, 2026—KB5099539 (OS Builds 19045.7548 and 19044.7548)

July 14, 2026—KB5099539 OS Builds 19045.7548 and 19044.7548 Applies To Windows 10 ESU Windows 10 Enterprise LTSC 2021 Windows 10 IoT Enterprise LTSC 2021 Windows Secure Boot certificate expiration --- Important Secure Boot certificates used by most Windows devices were set to expire starting in...

October 13, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 R2 (KB5127688)

October 13, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 R2 KB5127688 Applies To .NET Note 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 devi...

October 13, 2026-KB5127685 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 1809 and Windows Server 2019

October 13, 2026-KB5127685 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 1809 and Windows Server 2019 Applies To .NET Note Release Date: October 13, 2026 Version: .NET Framework 3.5 and 4.8 The October 13, 2026 update for Windows 10, version 1809 and Windows Server 2019...

Windows Remote Desktop Security Feature Bypass Vulnerability

Use of a broken or risky cryptographic algorithm in Windows Remote Desktop allows an unauthorized attacker to bypass a security feature over a network...

Windows Shell Spoofing Vulnerability

Incorrect implementation of authentication algorithm in Windows Shell allows an unauthorized attacker to perform spoofing over a network...

July 14, 2026—KB5099444 (Monthly Rollup)

July 14, 2026—KB5099444 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 sure...

July 14, 2026—KB5099445 (Monthly Rollup)

July 14, 2026—KB5099445 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...

July 14, 2026—KB5099535 (OS Build 14393.9339)

July 14, 2026—KB5099535 OS Build 14393.9339 Applies To Windows Server 2016, all editions Win 10 Ent LTSB 2016 Win 10 IoT Ent LTSB 2016 Windows Secure Boot certificate expiration --- Important Secure Boot certificates used by most Windows devices were set to expire starting in June 2026. Microsoft...

July 14, 2026—KB5101649 (OS Build 28000.2525)

July 14, 2026—KB5101649 OS Build 28000.2525 Applies To Windows 11 version 26H1, all editions This cumulative update for Windows 11, version 26H1 KB5101649 includes the latest security fixes and improvements, along with non-security updates from last month's optional preview release. Visit the...

K000163690: Apache Tomcat vulnerabilities CVE-2026-78437, CVE-2026-86248, and CVE-2026-87022

Security Advisory Description CVE-2026-78437 Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially depends on timing cause one request from another user to fail. This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, fro...

Security Bulletin: IBM WebSphere Application Server Liberty is affected by an improper restriction of XML external entity vulnerability due to RESTEasy (CVE-2026-17615)

Summary There is a vulnerability in the RestEasy library that affects IBM WebSphere Application Server Liberty with restfulWS-3.0, restfulWS-3.1, or restfulWS-4.0 enabled. Vulnerability Details CVEID:CVE-2026-17615 DESCRIPTION: A flaw was found in RESTEasy's SourceProvider. This vulnerability...