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Microsoft Security Response Center

Source: https://msrc.microsoft.com/update-guide/

All Critical High Medium Low With exploited CVEs

10,146 results · Feed

  • High max 7.3
    MSRC-CVE-2026-21244 1 CVE

    Windows Hyper-V Remote Code Execution Vulnerability

    Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 7.8
    MSRC-CVE-2026-21245 1 CVE rev. 2

    Windows Kernel Elevation of Privilege Vulnerability

    Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 3.3
    MSRC-CVE-2026-21249 1 CVE

    Windows NTLM Spoofing Vulnerability

    Impact: Spoofing. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 7.8
    MSRC-CVE-2026-21250 1 CVE

    Windows HTTP.sys Elevation of Privilege Vulnerability

    Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.

    Microsoft
  • High max 7.8
    MSRC-CVE-2026-21251 1 CVE

    Cluster Client Failover (CCF) Elevation of Privilege Vulnerability

    Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.

    Microsoft
  • High max 7.0
    MSRC-CVE-2026-21253 1 CVE

    Mailslot File System Elevation of Privilege Vulnerability

    Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation More Likely. Customer action: Required.

    Microsoft
  • High max 8.8
    MSRC-CVE-2026-21255 1 CVE rev. 2

    Windows Hyper-V Security Feature Bypass Vulnerability

    Impact: Security Feature Bypass. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 5.5
    MSRC-CVE-2026-21261 1 CVE

    Microsoft Excel Information Disclosure Vulnerability

    Impact: Information Disclosure. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 7.0
    MSRC-CVE-2026-21508 1 CVE

    Windows Storage Elevation of Privilege Vulnerability

    Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 8.8
    MSRC-CVE-2026-21516 1 CVE

    GitHub Copilot for Jetbrains Remote Code Execution Vulnerability

    Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • Medium max 6.2
    MSRC-CVE-2026-21525 1 CVE 1 exploited

    Windows Remote Access Connection Manager Denial of Service Vulnerability

    Impact: Denial of Service. Microsoft rating: Moderate. Exploited according to Microsoft — Exploitation Detected. Customer action: Required.

    Microsoft
  • High max 7.8
    MSRC-CVE-2026-21514 1 CVE 1 exploited

    Microsoft Word Security Feature Bypass Vulnerability

    Impact: Security Feature Bypass. Microsoft rating: Important. Exploited according to Microsoft, publicly disclosed before the fix — Exploitation Detected. Customer action: Required.

    Microsoft
  • High max 5.7
    MSRC-CVE-2026-21529 1 CVE

    Azure HDInsight Spoofing Vulnerability

    Impact: Spoofing. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.

    Microsoft
  • High max 8.8
    MSRC-CVE-2026-21537 1 CVE

    Microsoft Defender for Endpoint Linux Extension Remote Code Execution Vulnerability

    Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 8.8
    MSRC-CVE-2026-21510 1 CVE 1 exploited

    Windows Shell Security Feature Bypass Vulnerability

    Impact: Security Feature Bypass. Microsoft rating: Important. Exploited according to Microsoft, publicly disclosed before the fix — Exploitation Detected. Customer action: Required.

    Microsoft
  • High max 9.8
    MSRC-CVE-2026-21531 1 CVE

    Azure SDK for Python Remote Code Execution Vulnerability

    Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 6.5
    MSRC-CVE-2026-21527 1 CVE

    Microsoft Exchange Server Spoofing Vulnerability

    Impact: Spoofing. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • Critical max 6.7
    MSRC-CVE-2026-21522 1 CVE

    Microsoft ACI Confidential Containers Elevation of Privilege Vulnerability

    Impact: Elevation of Privilege. Microsoft rating: Critical. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 8.8
    MSRC-CVE-2026-21513 1 CVE 1 exploited

    MSHTML Framework Security Feature Bypass Vulnerability

    Impact: Security Feature Bypass. Microsoft rating: Important. Exploited according to Microsoft, publicly disclosed before the fix — Exploitation Detected. Customer action: Required.

    Microsoft
  • High max 7.8
    MSRC-CVE-2026-21533 1 CVE 1 exploited

    Windows Remote Desktop Services Elevation of Privilege Vulnerability

    Impact: Elevation of Privilege. Microsoft rating: Important. Exploited according to Microsoft — Exploitation Detected. Customer action: Required.

    Microsoft
  • Critical max 6.5
    MSRC-CVE-2026-23655 1 CVE

    Microsoft ACI Confidential Containers Information Disclosure Vulnerability

    Impact: Information Disclosure. Microsoft rating: Critical. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 7.5
    MSRC-CVE-2026-21218 1 CVE

    .NET Spoofing Vulnerability

    Impact: Spoofing. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.

    Microsoft
  • High max 7.8
    MSRC-CVE-2026-21236 1 CVE

    Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

    Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.

    Microsoft
  • High max 7.0
    MSRC-CVE-2026-21234 1 CVE

    Windows Connected Devices Platform Service Elevation of Privilege Vulnerability

    Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.

    Microsoft
  • High max 7.3
    MSRC-CVE-2026-21235 1 CVE

    Windows Graphics Component Elevation of Privilege Vulnerability

    Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 7.0
    MSRC-CVE-2026-21242 1 CVE

    Windows Subsystem for Linux Elevation of Privilege Vulnerability

    Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 7.3
    MSRC-CVE-2026-21247 1 CVE

    Windows Hyper-V Remote Code Execution Vulnerability

    Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 7.3
    MSRC-CVE-2026-21248 1 CVE

    Windows Hyper-V Remote Code Execution Vulnerability

    Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 7.5
    MSRC-CVE-2026-21260 1 CVE

    Microsoft Outlook Spoofing Vulnerability

    Impact: Spoofing. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.

    Microsoft
  • High max 5.5
    MSRC-CVE-2026-21258 1 CVE

    Microsoft Excel Information Disclosure Vulnerability

    Impact: Information Disclosure. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 7.8
    MSRC-CVE-2026-21259 1 CVE

    Microsoft Excel Elevation of Privilege Vulnerability

    Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 6.5
    MSRC-CVE-2026-21512 1 CVE

    Azure DevOps Server Cross-Site Scripting Vulnerability

    Impact: Spoofing. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • High max 7.8
    MSRC-CVE-2026-21519 1 CVE 1 exploited

    Desktop Window Manager Elevation of Privilege Vulnerability

    Impact: Elevation of Privilege. Microsoft rating: Important. Exploited according to Microsoft — Exploitation Detected. Customer action: Required.

    Microsoft
  • High max 7.5
    MSRC-CVE-2024-30098 1 CVE rev. 7

    Windows Cryptographic Services Security Feature Bypass Vulnerability

    Impact: Security Feature Bypass. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
    first Jul 9, 2024
  • High max 6.5
    MSRC-CVE-2023-2804 1 CVE

    Red Hat, Inc. CVE-2023-2804: Heap Based Overflow libjpeg-turbo

    Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • Medium max 6.5
    MSRC-CVE-2026-0391 1 CVE

    Microsoft Edge (Chromium-based) for Android Spoofing Vulnerability

    Impact: Spoofing. Microsoft rating: Moderate. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
  • Critical max 9.8
    MSRC-CVE-2026-24300 1 CVE

    Azure Front Door Elevation of Privilege Vulnerability

    Impact: Elevation of Privilege. Microsoft rating: Critical. Not known to be exploited. Customer action: Not required.

    Microsoft
  • Critical max 8.2
    MSRC-CVE-2026-21532 1 CVE

    Azure Function Information Disclosure Vulnerability

    Impact: Information Disclosure. Microsoft rating: Critical. Not known to be exploited. Customer action: Not required.

    Microsoft
  • High max 7.8
    MSRC-CVE-2026-21509 1 CVE 1 exploited rev. 7

    Microsoft Office Security Feature Bypass Vulnerability

    Impact: Security Feature Bypass. Microsoft rating: Important. Exploited according to Microsoft — Exploitation Detected. Customer action: Required.

    Microsoft
    first Jan 26, 2026
  • High max 8.0
    MSRC-CVE-2026-20960 1 CVE rev. 2

    PowerApps Desktop Client Remote Code Execution Vulnerability

    Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

    Microsoft
    first Jan 16, 2026