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Advisory severityHigh7.8Microsoft Server

High [CVE-2026-50649] .NET Remote Code Execution Vulnerability

This high-severity Microsoft Server advisory covers CVE-2026-50649 affecting Microsoft .NET Framework 4.8 on Windows Server 2016, Microsoft .NET Framework 4.8 on Windows Server 2012 R2, Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-50649 Source published

VulniPulse record published Record updated

CVE-2026-50649
Affected products & platforms
Microsoft ServerWindows Server
Open source advisory

Summary

.NET Remote Code Execution Vulnerability

Affected products named by the advisory: Microsoft.NET Framework 4.8 on Windows Server 2016; Microsoft.NET Framework 4.8 on Windows Server 2012; Microsoft.NET Framework 4.8 on Windows Server 2012 R2; Microsoft.NET Framework 3.5 AND 4.8 on Windows Server 2019; and 4 more.

Affected products named by the advisory: Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022; 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 2016; Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012.

Is CVE-2026-50649 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-50649 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-50649?

Upgrade to a fixed release named by Microsoft:

  • KB5104032 (build 8.0.29)
  • KB5104033 (build 9.0.18)
  • KB5101014 (build 2.0.50727.9182 & 3.0.30729.9168)
  • KB5101002 (build 4.8.9340.0)
  • KB5101007 (build 4.8.4803.0)
  • KB5101009 (build 4.8.4803.0)
  • KB5101011 (build 4.8.4803.0)
  • KB5101008 (build 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0)

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • KB5104032 (build 8.0.29)
  • KB5104033 (build 9.0.18)
  • KB5101014 (build 2.0.50727.9182 & 3.0.30729.9168)
  • KB5101002 (build 4.8.9340.0)
  • KB5101007 (build 4.8.4803.0)
  • KB5101009 (build 4.8.4803.0)
  • KB5101011 (build 4.8.4803.0)
  • KB5101008 (build 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0)

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Install the applicable security update for your platform: KB5104032, KB5104033, KB5101014, KB5101002, KB5101007, KB5101009 (see the Microsoft Update Catalog).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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