CVE-2026-50649: .NET Remote Code Execution Vulnerability

Published Jul 14, 2026
·
Updated

.NET Remote Code Execution Vulnerability

Other sources

Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code locally.

— Microsoft

Affected Software

112 affected componentsFixes available
Microsoft .NET 8.0 installed on Windows<8.0.29
8.0.29
Microsoft Visual Studio 2022=17.12
17.12.22
Microsoft Visual Studio 2022=17.14
17.14.36
Microsoft .NET Framework=3.5
2.0.50727.8983 & 3.0.30729.8978
Microsoft .NET Framework=4.8
4.8.4803.0
Microsoft .NET Framework=3.5
2.0.50727.8983 & 3.0.30729.8978
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9182 & 3.0.30729.9168
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9340.0
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9340.0
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0
Microsoft .NET Framework=4.6.2, =4.7, =4.7.1, =4.7.2
4.7.4143.0
Microsoft .NET Framework=4.6.2, =4.7, =4.7.1, =4.7.2
4.7.4143.0
Microsoft .NET Framework=3.5, =4.7.2
2.0.50727.8983 & 3.0.30729.8978 & 4.7.4143.0
Microsoft .NET Framework=3.5, =4.7.2
2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0
Microsoft .NET Framework=3.5, =4.8
2.0.50727.9182 & 3.0.30729.9168 & 4.8.4803.0
Microsoft .NET Framework=3.5, =4.8
2.0.50727.9182 & 3.0.30729.9168 & 4.8.4803.0
Microsoft .NET Framework=3.5, =4.8
2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0
Microsoft .NET Framework=4.8
4.8.4803.0
Microsoft .NET Framework=4.8
4.8.4803.0
Microsoft .NET Framework=3.5
2.0.50727.9182 & 3.0.30729.9168
Microsoft .NET Framework=4.8.1
4.8.9340.0
All of the following
Microsoft .NET Framework=4.8.1
Any of the following
Microsoft Windows 11 26h1
Microsoft Windows 11 26h1
All of the following
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows 10 1607
Microsoft Windows 10 1607
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016
All of the following
Any of the following
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Any of the following
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.8.1
Any of the following
Microsoft Windows 10 21h2
Microsoft Windows 10 21h2
Microsoft Windows 10 21h2
Microsoft Windows 10 22h2
Microsoft Windows 10 22h2
Microsoft Windows 10 22h2
Microsoft Windows 11 23h2
Microsoft Windows 11 23h2
Microsoft Windows 11 24h2
Microsoft Windows 11 24h2
Microsoft Windows 11 25h2
Microsoft Windows 11 25h2
Microsoft Windows Server 2022
All of the following
Any of the following
Microsoft .NET>=8.0.0<8.0.29
Microsoft .NET>=9.0.0<9.0.18
Microsoft Windows
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows 10 1809
Microsoft Windows 10 1809
Microsoft Windows 10 21h2
Microsoft Windows 10 21h2
Microsoft Windows 10 21h2
Microsoft Windows 10 22h2
Microsoft Windows 10 22h2
Microsoft Windows 10 22h2
Microsoft Windows Server 2019
Microsoft Windows Server 2022
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.7.2
Any of the following
Microsoft Windows 10 1607
Microsoft Windows 10 1607
Microsoft Windows 10 1809
Microsoft Windows 10 1809
Microsoft Windows Server 2016
Microsoft Windows Server 2019
All of the following
Microsoft .NET Framework=3.5
Any of the following
Microsoft Windows 11 26h1
Microsoft Windows 11 26h1
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Visual Studio 2026>=18.7.0<18.7.4
Microsoft .NET Framework=3.5, =4.8.1, >=2.0.50727<2.0.50727.9182, >=3.0.30729<3.0.30729.9168
2.0.50727.91823.0.30729.91684.8.9339.0
Microsoft .NET Framework=3.5, =4.8.1, >=2.0.50727<2.0.50727.9182, >=3.0.30729<3.0.30729.9168
2.0.50727.91823.0.30729.91684.8.9339.0
Microsoft .NET Framework=3.5, >=2.0.50727<2.0.50727.9182, >=3.0.30729<3.0.30729.9168
2.0.50727.91823.0.30729.9168
Microsoft .NET Framework=3.5, >=2.0.50727<2.0.50727.8983, >=3.0.30729<3.0.30729.8978
2.0.50727.89833.0.30729.8978
Microsoft .NET Framework>=4.8<4.8.4803.0
4.8.4803.0
Microsoft .NET Framework=3.5, =4.8.1, >=2.0.50727<2.0.50727.9182, >=3.0.30729<3.0.30729.9168
2.0.50727.91823.0.30729.91684.8.9339.0
Microsoft .NET Framework=3.5, =4.8.1, >=2.0.50727<2.0.50727.9182, >=3.0.30729<3.0.30729.9168
2.0.50727.91823.0.30729.91684.8.9340.0
Microsoft .NET Framework=3.5, >=2.0.50727<2.0.50727.8983, >=3.0.30729<3.0.30729.8978
2.0.50727.89833.0.30729.8978
Microsoft .NET Framework=4.6.2, >=4.7<4.7.4143.0, =4.7.1, =4.7.2
4.7.4143.0
Microsoft .NET Framework=4.6.2, >=4.7<4.7.4143.0, =4.7.1, =4.7.2
4.7.4143.0
Microsoft .NET Framework=3.5, =4.7.2, >=2.0.50727<2.0.50727.8983, >=3.0.30729<3.0.30729.8978
2.0.50727.89833.0.30729.89784.7.4143.0
Microsoft .NET Framework=3.5, =4.7.2, >=2.0.50727<2.0.50727.9069, >=3.0.30729<3.0.30729.9067
2.0.50727.90693.0.30729.90674.7.4143.0
Microsoft .NET Framework=3.5, >=4.8<4.8.4803.0, >=2.0.50727<2.0.50727.9182, >=3.0.30729<3.0.30729.9168
2.0.50727.91823.0.30729.91684.8.4803.0
Microsoft .NET Framework=3.5, >=4.8<4.8.4803.0, >=2.0.50727<2.0.50727.9182, >=3.0.30729<3.0.30729.9168
2.0.50727.91823.0.30729.91684.8.4803.0
Microsoft .NET Framework=3.5, >=4.8<4.8.4803.0, >=2.0.50727<2.0.50727.9069, >=3.0.30729<3.0.30729.9067
2.0.50727.90693.0.30729.90674.8.4803.0
Microsoft .NET Framework>=4.8<4.8.4803.0
4.8.4803.0
Microsoft .NET Framework>=4.8<4.8.4803.0
4.8.4803.0
Microsoft Visual Studio 2026>=18.7<18.7.4
18.7.4
All of the following
Microsoft .NET runtime>=9.0<9.0.18
9.0.18
Microsoft Windows*
All of the following
Microsoft .NET runtime>=8.0<8.0.29
8.0.29
Microsoft Windows*
alpine/dotnet10-runtime<10.0.10-r0
10.0.10-r0
alpine/dotnet10-runtime<10.0.10-r0
10.0.10-r0
alpine/dotnet8-runtime<8.0.29-r0
8.0.29-r0
alpine/dotnet8-runtime<8.0.29-r0
8.0.29-r0
alpine/dotnet8-runtime<8.0.29-r0
8.0.29-r0
alpine/dotnet9-runtime<9.0.18-r0
9.0.18-r0
alpine/dotnet9-runtime<9.0.18-r0
9.0.18-r0
alpine/dotnet9-runtime<9.0.18-r0
9.0.18-r0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 8.0.29Patch KB5104032
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 17.12.22
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 17.14.36
  4. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.8983 & 3.0.30729.8978Patch KB5100985
  5. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 4.8.4803.0Patch KB5101007
  6. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.8983 & 3.0.30729.8978Patch KB5100984
  7. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182 & 3.0.30729.9168Patch KB5101014
  8. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0Patch KB5101001
  9. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9340.0Patch KB5101003
  10. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0Patch KB5101004
  11. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9340.0Patch KB5100998
  12. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0Patch KB5101000
  13. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0Patch KB5101005
  14. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 4.7.4143.0Patch KB5100990
  15. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 4.7.4143.0Patch KB5100991
  16. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.8983 & 3.0.30729.8978 & 4.7.4143.0Patch KB5099535
  17. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0Patch KB5100989
  18. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182 & 3.0.30729.9168 & 4.8.4803.0Patch KB5101006
  19. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182 & 3.0.30729.9168 & 4.8.4803.0Patch KB5101010
  20. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0Patch KB5101008
  21. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 4.8.4803.0Patch KB5101011
  22. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 4.8.4803.0Patch KB5101009
  23. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 4.8.9340.0Patch KB5101002
  24. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182Fixed in 3.0.30729.9168Fixed in 4.8.9339.0Patch KB5101001
  25. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182Fixed in 3.0.30729.9168Fixed in 4.8.9339.0Patch KB5101004
  26. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182Fixed in 3.0.30729.9168Patch KB5101014
  27. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.8983Fixed in 3.0.30729.8978Patch KB5100984
  28. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182Fixed in 3.0.30729.9168Fixed in 4.8.9339.0Patch KB5101000
  29. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182Fixed in 3.0.30729.9168Fixed in 4.8.9340.0Patch KB5100998
  30. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.8983Fixed in 3.0.30729.8978Patch KB5100985
  31. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182Fixed in 3.0.30729.9168Fixed in 4.8.9339.0Patch KB5101005
  32. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.8983Fixed in 3.0.30729.8978Fixed in 4.7.4143.0Patch KB5099535
  33. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9069Fixed in 3.0.30729.9067Fixed in 4.7.4143.0Patch KB5100989
  34. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182Fixed in 3.0.30729.9168Fixed in 4.8.4803.0Patch KB5101006
  35. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9182Fixed in 3.0.30729.9168Fixed in 4.8.4803.0Patch KB5101010
  36. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9069Fixed in 3.0.30729.9067Fixed in 4.8.4803.0Patch KB5101008
  37. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 18.7.4
  38. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 9.0.18Patch KB5104033
  39. Upgrade

    Upgrade alpine/dotnet10-runtime to a version that resolves this vulnerability.

    Fixed in 10.0.10-r0
  40. Upgrade

    Upgrade alpine/dotnet8-runtime to a version that resolves this vulnerability.

    Fixed in 8.0.29-r0
  41. Upgrade

    Upgrade alpine/dotnet9-runtime to a version that resolves this vulnerability.

    Fixed in 9.0.18-r0

Event History

Jul 14, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·07:29 PM
Data Sourced
via MITRE·07:29 PM
DescriptionSeverity
Data Sourced
via Red Hat·08:02 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·08:17 PM
RemedyDescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·08:17 PM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2026-50649?

CVE-2026-50649 has a high severity rating of 7.8 on the CVSS scale.

2

How do I fix CVE-2026-50649?

To fix CVE-2026-50649, update your Microsoft .NET Framework and Visual Studio to the latest patched versions.

3

What software is affected by CVE-2026-50649?

CVE-2026-50649 affects Microsoft .NET Framework, Microsoft Visual Studio 2022, .NET 8.0, .NET 9.0, and Microsoft Visual Studio 2026.

4

What type of vulnerability is CVE-2026-50649?

CVE-2026-50649 is a remote code execution vulnerability resulting from the deserialization of untrusted data in .NET.

5

Can CVE-2026-50649 be exploited by an unauthorized user?

Yes, CVE-2026-50649 can be exploited by an unauthorized attacker to execute code locally.

Company

Resources

Contact

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