Vulnerability Intelligence Report
.NET Remote Code Execution Vulnerability
CVE-2026-83520
Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code over a network.
Deserialization
No Active Exploit Signals
CVSS Base Score
8.8
HIGH
Exploitability:2.9
Impact Score:5.9
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-502 ↗CWE-502: Deserialization of Untrusted Data
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| 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) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
GitHub Advisory
Vulnerability Class
Deserialization
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2026-08-31T15:57:21 |
| Published | 2026-10-13T19:01:15 |
| Patch Date | 2026-10-13 |
| Last Updated | 2026-10-13T22:23:51 |
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