.NET Remote Code Execution Vulnerability
Published October 13, 2026Updated October 15, 2026
Source data
Overview
Improperly implemented security check for standard in .NET allows an unauthorized attacker to execute code over a network.
Impact & technical details
Remote Code Execution
According to the CVSS metric, the attack vector is network (AV:N) and user interaction is required (UI:R). What is the target context of the remote code execution? This attack requires a user to open a specially crafted file from the attacker to initiate remote code execution.
- CVSS base score
- 8.8 / 10
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Highest base score supplied by MSRC for this record; the vector belongs to that score. Ratings can vary by product. Microsoft Important is displayed as High; Moderate is displayed as Medium.
Affected products
- .NET 10.0 runtime installed on Windows
- .NET 11.0 runtime installed on Windows
- .NET 8.0 runtime installed on Windows
- .NET 9.0 runtime 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
- Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016
- Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2019
- Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 version 1809
Show all 33 affected products
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 1809
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 21H2
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 22H2
- Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019
- Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 21H2
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 22H2
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 23H2
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 24H2
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 25H2
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 26H2
- 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 2025
- Microsoft .NET Framework 3.5 on Windows 11 version 26H1
- Microsoft .NET Framework 3.5 on Windows Server 2012
- Microsoft .NET Framework 3.5 on Windows Server 2012 R2
- 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 R2
- Microsoft .NET Framework 4.8 on Windows 10 version 1607
- Microsoft .NET Framework 4.8 on Windows Server 2012
- Microsoft .NET Framework 4.8 on Windows Server 2012 R2
- Microsoft .NET Framework 4.8 on Windows Server 2016
- Microsoft .NET Framework 4.8.1 on Windows 11 version 26H1
- Microsoft Visual Studio 2022 version 17.14
- Microsoft Visual Studio 2026 version 18.10
Source guidance
Remediation
- Release Notes
At least one Microsoft vendor-fix reference is available. Check each affected product for its applicable update, prerequisites, and supported version.
GTP recommendation · Rule-based guidance
Recommended next step
Review affected Microsoft products and apply the applicable security updates through your organization's normal patch-management process. Confirm availability and prerequisites in the Microsoft advisory.
Authoritative sources & updates
Findings and update information come from the linked publishers. GTP compiles the public record and provides the recommendation above. CVSS ratings shown here come from Microsoft. NVD references provide additional public context.
- Microsoft Security Response Center (opens in a new tab)
- Microsoft security update · Release Notes (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · Release Notes (opens in a new tab)
- Microsoft security update · Release Notes (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5130036 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5130034 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5130035 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127689 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127690 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127691 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127692 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127693 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127694 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127696 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127660 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127664 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5126868 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127666 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127685 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127683 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127687 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127667 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127668 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127684 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127686 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
- Microsoft security update · 5127688 (opens in a new tab)
- Microsoft remediation guidance (opens in a new tab)
Managed by GTP?
Griffin Technology Partners managed customers may receive additional environment-specific security guidance and remediation assistance through their managed services relationship.
Security bulletins are provided for informational purposes and compiled from authoritative public sources. Vulnerability applicability varies by environment. Validate affected products, configuration, compatibility requirements, and vendor guidance before making production changes.