Microsoft February 2026 Security Updates

February 2026 Security Updates



This release consists of the following 59 Microsoft CVEs:


Tag CVE Base Score CVSS Vector Exploitability FAQs? Workarounds? Mitigations?
Windows Win32K - GRFX CVE-2023-2804
Microsoft Edge for Android CVE-2026-0391
Windows Notepad App CVE-2026-20841
Windows GDI+ CVE-2026-20846 7.5
.NET and Visual Studio CVE-2026-21218
Windows Kernel CVE-2026-21222
Azure Local CVE-2026-21228
Power BI CVE-2026-21229
Windows Kernel CVE-2026-21231
Windows HTTP.sys CVE-2026-21232
Windows Connected Devices Platform Service CVE-2026-21234
Microsoft Graphics Component CVE-2026-21235
Windows Ancillary Function Driver for WinSock CVE-2026-21236
Windows Subsystem for Linux CVE-2026-21237
Windows Ancillary Function Driver for WinSock CVE-2026-21238
Windows Kernel CVE-2026-21239
Windows HTTP.sys CVE-2026-21240
Windows Ancillary Function Driver for WinSock CVE-2026-21241
Windows Subsystem for Linux CVE-2026-21242
Windows LDAP - Lightweight Directory Access Protocol CVE-2026-21243
Role: Windows Hyper-V CVE-2026-21244
Windows Kernel CVE-2026-21245
Microsoft Graphics Component CVE-2026-21246
Role: Windows Hyper-V CVE-2026-21247
Role: Windows Hyper-V CVE-2026-21248
Windows NTLM CVE-2026-21249
Windows HTTP.sys CVE-2026-21250
Windows Cluster Client Failover CVE-2026-21251
Mailslot File System CVE-2026-21253
Role: Windows Hyper-V CVE-2026-21255
GitHub Copilot and Visual Studio CVE-2026-21256
GitHub Copilot and Visual Studio CVE-2026-21257
Microsoft Office Excel CVE-2026-21258
Microsoft Office Excel CVE-2026-21259
Microsoft Office Word CVE-2026-21260
Microsoft Office Excel CVE-2026-21261
Windows Storage CVE-2026-21508
Windows Shell CVE-2026-21510
Microsoft Office Outlook CVE-2026-21511
Azure DevOps Server CVE-2026-21512
Internet Explorer CVE-2026-21513
Microsoft Office Word CVE-2026-21514
Github Copilot CVE-2026-21516
Windows App for Mac CVE-2026-21517
.NET CVE-2026-21518
Desktop Window Manager CVE-2026-21519
Azure Compute Gallery CVE-2026-21522
GitHub Copilot and Visual Studio CVE-2026-21523
Windows Remote Access Connection Manager CVE-2026-21525
Microsoft Exchange Server CVE-2026-21527
Azure IoT SDK CVE-2026-21528
Azure HDInsights CVE-2026-21529
Azure SDK CVE-2026-21531
Azure Function CVE-2026-21532
Windows Remote Desktop CVE-2026-21533
Microsoft Defender for Linux CVE-2026-21537
Azure Compute Gallery CVE-2026-23655
Azure Front Door (AFD) CVE-2026-24300
Azure Arc CVE-2026-24302

We are republishing 1 non-Microsoft CVEs:


CNA Tag CVE FAQs? Workarounds? Mitigations?
Chrome Microsoft Edge (Chromium-based) CVE-2026-1861 Yes No No

Security Update Guide Blog Posts


Date Blog Post
October 31, 2025 You asked, we delivered: Introducing new features for an improved security experience
October 28, 2025 Understanding CVE-2025-55315: What CISOs, security engineers, and sysadmins should know
October 22, 2025 Toward greater transparency: Introducing machine-readable Vulnerability Exploitability Xchange (VEX) for Azure Linux and beyond
November 12, 2024 Toward greater transparency: Publishing machine-readable CSAF files
June 27, 2024 Toward greater transparency: Unveiling Cloud Service CVEs
April 9, 2024 Toward greater transparency: Security Update Guide now shares CWEs for CVEs
January 6, 2023 Publishing CBL-Mariner CVEs on the Security Update Guide CVRF API
January 11, 2022 Coming Soon: New Security Update Guide Notification System
February 9, 2021 Continuing to Listen: Good News about the Security Update Guide API
January 13, 2021 Security Update Guide Supports CVEs Assigned by Industry Partners
December 8, 2020 Security Update Guide: Let’s keep the conversation going
November 9, 2020 Vulnerability Descriptions in the New Version of the Security Update Guide

Relevant Resources

• The new Hotpatching feature is now generally available. Please see Hotpatching feature for Windows Server Azure Edition virtual machines (VMs) for more information.
• Windows 10 and Windows 11 updates are cumulative. The monthly security release includes all security fixes for vulnerabilities that affect Windows 10 and Windows 11, in addition to non-security updates. The updates are available via the Microsoft Update Catalog. For information on lifecycle and support dates for Windows 10 and Windows 11 operating systems, please see Windows Lifecycle Facts Sheet.
• Microsoft is improving Windows Release Notes. For more information, please see What's next for Windows release notes.
• A list of the latest servicing stack updates for each operating system can be found in ADV990001. This list will be updated whenever a new servicing stack update is released. It is important to install the latest servicing stack update.
• In addition to security changes for the vulnerabilities, updates include defense-in-depth updates to help improve security-related features.
• Customers running Windows Server 2008 R2, or Windows Server 2008 need to purchase the Extended Security Update to continue receiving security updates. See 4522133 for more information.

Known Issues


KB Article Product
5075942 Windows Server 2025 Hotpatch
5075897 Windows Server 23H2
5075899 Windows Server 2025
5075906 Windows Server 2022

Released: Feb 10, 2026

February 2026 Security Updates - Release Notes - Security Update Guide - Microsoft