CVE-2026-47304

.NET Security Feature Bypass Vulnerability

State: Published
Severity: 8.1 High
Published: Jul 14, 2026
Updated: Nov 1, 2026
Reserved: May 18, 2026

Description

Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-347 Improper Verification of Cryptographic Signature
CWE-345 Insufficient Verification of Data Authenticity

Affected Products

Product	Versions
.NET 10.0 runtimeMicrosoft	10.0.0 to before 10.0.10Affected
.NET 8.0 runtimeMicrosoft	8.0.0 to before 8.0.29Affected
.NET 9.0 runtimeMicrosoft	9.0.0 to before 9.0.18Affected
Microsoft .NET Framework 3.5Microsoft	3.5.0 to before 2.0.50727.8983 & 3.0.30729.8978Affected
Microsoft .NET Framework 3.5 AND 4.7.2Microsoft	4.7.0 to before 2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0Affected
Microsoft .NET Framework 3.5 AND 4.8Microsoft	4.8.0 to before 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0Affected
Microsoft .NET Framework 3.5 AND 4.8.1Microsoft	4.8.1 to before 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0Affected
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2Microsoft	4.7.0 to before 4.7.4143.0Affected
Microsoft .NET Framework 4.8Microsoft	4.8.0 to before 4.8.4803.0Affected
Microsoft .NET Framework 4.8.1Microsoft	4.8.0.0 to before 4.8.9340.0Affected
Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)Microsoft	-Affected
Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10)Microsoft	-Affected
Microsoft Visual Studio 2022 version 17.12Microsoft	17.12.0 to before 17.12.22Affected
Microsoft Visual Studio 2022 version 17.14Microsoft	17.14.0 to before 17.14.36Affected
Microsoft Visual Studio 2026 version 18.5Microsoft	-Affected
Microsoft Visual Studio 2026 version 18.7Microsoft	18.0 to before 18.7.4Affected

References

.NET Security Feature Bypass Vulnerabilityvendor-advisorypatch

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