Patch tracker / CVE reference / CVE-2025-21176
CVE-2025-21176
CVE-2025-21176 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 8.8 (High). Its EPSS score puts the probability of exploitation in the next 30 days at 81%. Microsoft has shipped the fix: deploy one of the 19 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
Risk summary
Not in the CISA KEV catalog. EPSS exploit probability 81%. CVSS 8.8 (High).
This CVE is among the top 10% of tracked Microsoft CVEs by EPSS exploit probability.
.NET, .NET Framework, and Visual Studio share this remote code execution flaw, rated Critical at CVSS 9.8 with an 81% EPSS score. Visual Studio 2017 15.9, 2019 16.11, and 2022 17.6 are listed, which puts developer machines and build servers squarely in scope, and compromised build infrastructure threatens everything it produces.
Do this: Update Visual Studio and .NET runtimes on build agents and developer workstations first, treating CI servers as the highest-value targets.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2025-21176
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Official patch(es) for CVE-2025-21176
High priority: EPSS puts the odds of near-term exploitation high. In Intune or Defender, confirm whether the fixing updates KB5049614, KB5049620, KB5049622, KB5049624, KB5049688, KB5049993, KB5050013, KB5050180, KB5050181, KB5050182, KB5050183, KB5050184, KB5050185, KB5050186, KB5050187, KB5050188, KB5050416, KB5050525, KB5050526 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.
Apply the Microsoft security updates below to fix CVE-2025-21176. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.
Scope and sources
- Affected products
- .NET 8.0 installed on Linux
- .NET 8.0 installed on Mac OS
- .NET 8.0 installed on Windows
- .NET 9.0 installed on Linux
- .NET 9.0 installed on Mac OS
- .NET 9.0 installed on Windows
- Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems
- Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems
- Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2016
- Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2016 (Server Core installation)
- Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019
- Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation)
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for 32-bit Systems
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for 32-bit Systems
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019
- Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation)
- Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022
- Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 (Server Core installation)
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for 32-bit Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for 32-bit Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 22H2 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 22H2 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 (Server Core installation)
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022, 23H2 Edition (Server Core installation)
- Microsoft .NET Framework 4.6.2 on Windows Server 2008 for 32-bit Systems Service Pack 2
- Microsoft .NET Framework 4.6.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
- Microsoft .NET Framework 4.6.2 on Windows Server 2008 for x64-based Systems Service Pack 2
- Microsoft .NET Framework 4.6.2 on Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
- Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1
- Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
- Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012
- Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation)
- Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2
- Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation)
- Microsoft .NET Framework 4.6/4.6.2 on Windows 10 for 32-bit Systems
- Microsoft .NET Framework 4.6/4.6.2 on Windows 10 for x64-based Systems
- Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems
- Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems
- Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1
- Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
- Microsoft .NET Framework 4.8 on Windows Server 2012
- Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation)
- Microsoft .NET Framework 4.8 on Windows Server 2012 R2
- Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation)
- Microsoft .NET Framework 4.8 on Windows Server 2016
- Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation)
- Microsoft Visual Studio 2015 Update 3
- Windows 10 Version 1607 for 32-bit Systems
- Windows 10 Version 1607 for x64-based Systems
- Windows 10 for 32-bit Systems
- Windows 10 for x64-based Systems
- Windows Server 2016
- Windows Server 2016 (Server Core installation)
- Fixed by the same updates
- Authoritative references
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