CVE-2026-70194

.NET Framework Security Feature Bypass Vulnerability

State: Published
Severity: 6.5 Medium
Published: Oct 13, 2026
Updated: Oct 31, 2026
Reserved: Aug 3, 2026

Description

Improper certificate validation in .NET Framework allows an unauthorized attacker to bypass a security feature over a network.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-295 Improper Certificate Validation

Affected Products

Product	Versions
.NET 11.0 runtimeMicrosoft	11.0.0 to before 11.0.0-rc.2Affected
Microsoft Visual Studio 2022 version 17.14Microsoft	17.14.0 to before 17.14.42Affected
Microsoft Visual Studio 2026 version 18.10Microsoft	18.10.0 to before 18.10.4Affected

References

.NET Framework Security Feature Bypass Vulnerabilityvendor-advisorypatch

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