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CVE-2026-83520— .NET Remote Code Execution Vulnerability

Quick assessment

Affected
Microsoft .NET 10.0
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 .NET 中对不受信任的数据进行反序列化，允许未经授权的攻击者通过网络执行代码。

CVSS 8.8 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 14

VendorProduct Version RangeStatus
Microsoft .NET 10.0 10.0.0< 10.0.13 affected
Microsoft .NET 11.0 11.0.0< 11.0.0-rc.2 affected
Microsoft .NET 8.0 8.0.0< 8.0.32 affected
Microsoft .NET 9.0 9.0.0< 9.0.21 affected
Microsoft Microsoft .NET Framework 3.5 3.5.0< 2.0.50727.9188 AND 3.0.30729.9171 affected
Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 3.0.0.0< 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0 affected
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 4.7.0< 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 affected
Microsoft Microsoft .NET Framework 3.5 AND 4.8 4.8.0< 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 affected
Microsoft Microsoft .NET Framework 3.5 AND 4.8.1 4.8.1< 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 affected
Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.7.0< 4.7.4150.0 affected
Microsoft Microsoft .NET Framework 4.8 4.8.0< 4.8.4811.0 affected
Microsoft Microsoft .NET Framework 4.8.1 4.8.0.0< 4.8.9363.0 affected
Microsoft Microsoft Visual Studio 2022 version 17.14 17.14.0< 17.14.42 affected
Microsoft Microsoft Visual Studio 2026 version 18.10 18.10.0< 18.10.4 affected
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I. Basic Information for CVE-2026-83520

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
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Vulnerability Title
.NET Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft .NET 10.0 10.0.0 ~ 10.0.13 -
Microsoft .NET 11.0 11.0.0 ~ 11.0.0-rc.2 -
Microsoft .NET 8.0 8.0.0 ~ 8.0.32 -
Microsoft .NET 9.0 9.0.0 ~ 9.0.21 -
Microsoft Microsoft .NET Framework 3.5 3.5.0 ~ 2.0.50727.9188 AND 3.0.30729.9171 -
Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 3.0.0.0 ~ 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0 -
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 4.7.0 ~ 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 -
Microsoft Microsoft .NET Framework 3.5 AND 4.8 4.8.0 ~ 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 -
Microsoft Microsoft .NET Framework 3.5 AND 4.8.1 4.8.1 ~ 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 -
Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.7.0 ~ 4.7.4150.0 -
Microsoft Microsoft .NET Framework 4.8 4.8.0 ~ 4.8.4811.0 -
Microsoft Microsoft .NET Framework 4.8.1 4.8.0.0 ~ 4.8.9363.0 -
Microsoft Microsoft Visual Studio 2022 version 17.14 17.14.0 ~ 17.14.42 -
Microsoft Microsoft Visual Studio 2026 version 18.10 18.10.0 ~ 18.10.4 -

II. Public POCs for CVE-2026-83520

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III. Intelligence Information for CVE-2026-83520

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Vendor Advisories for CVE-2026-83520 (1)

Same Patch Batch · Microsoft · 2026-10-13 · 1407 CVEs total

CVE-2026-85792 9.8 CRITICAL Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
CVE-2026-88178 9.8 CRITICAL Microsoft Office PowerPoint Remote Code Execution Vulnerability
CVE-2026-88156 9.8 CRITICAL Microsoft Office Outlook Remote Code Execution Vulnerability
CVE-2026-100222 9.8 CRITICAL Network Policy Server (NPS) Remote Code Execution Vulnerability
CVE-2026-85928 9.8 CRITICAL Windows Volume Manager Extension Driver Remote Code Execution Vulnerability
CVE-2026-96096 9.8 CRITICAL Windows Media Player Remote Code Execution Vulnerability
CVE-2026-70291 9.8 CRITICAL Microsoft Office Outlook Remote Code Execution Vulnerability
CVE-2026-96934 9.8 CRITICAL Windows DHCP Server Remote Code Execution Vulnerability
CVE-2026-96924 9.8 CRITICAL Windows OLE Remote Code Execution Vulnerability
CVE-2026-97816 9.8 CRITICAL Microsoft OpenSSH for Windows Remote Code Execution Vulnerability
CVE-2026-83770 9.8 CRITICAL Windows Text Shaping Remote Code Execution Vulnerability
CVE-2026-97814 9.8 CRITICAL Windows Text Shaping Remote Code Execution Vulnerability
CVE-2026-97815 9.8 CRITICAL Windows Error Reporting Remote Code Execution Vulnerability
CVE-2026-96113 9.8 CRITICAL Windows Domain Name Service Remote Code Execution Vulnerability
CVE-2026-97805 9.8 CRITICAL Windows Partition Management Driver Remote Code Execution Vulnerability
CVE-2026-83748 9.8 CRITICAL Windows Error Reporting Remote Code Execution Vulnerability
CVE-2026-69705 9.8 CRITICAL Windows iSCSI Remote Code Execution Vulnerability
CVE-2026-69634 9.8 CRITICAL Windows iSCSI Remote Code Execution Vulnerability
CVE-2026-83517 9.8 CRITICAL Microsoft Windows Media Foundation Remote Code Execution Vulnerability
CVE-2026-83782 9.8 CRITICAL Windows Shell Remote Code Execution Vulnerability

Showing top 20 of 1407 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: .NET 10.0
Same vendor: Microsoft
Same weakness: CWE-502

V. Comments for CVE-2026-83520

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