Recorded 14 Oct 2026 at 11:22 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.

CVEMicrosoft Security Response Center

.NET Framework Security Feature Bypass Vulnerability

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

Permanent link to this revision

What it said

CVE: CVE-2026-70194
Severity: Important
CVSS base score: 6.5
CVSS vector: 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
Impact: Security Feature Bypass
Exploitation detected: Not reported by MSRC
Publicly disclosed: No
Exploitability: Exploitation Less Likely
Component: .NET Framework
Weakness: CWE-295: Improper Certificate Validation
Issued by: Microsoft
Customer action: Required: apply the update
Affected products: .NET 11.0 installed on Linux, .NET 11.0 installed on Mac OS, Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10
Updates that fix it: No KB listed
CISA KEV: Not listed in the collected catalog
EPSS: Not scored
Public exploit code: No Nuclei template listed
Published: 13 Oct 2026 07:00 UTC
Last revised: 13 Oct 2026 07:00 UTC
Revision note: Information published.

Recorded links

Source evidence when recorded

Microsoft security releases: Complete at observationRead 14 Oct 2026 at 11:21 UTC
CISA KEV: Complete at observationRead 14 Oct 2026 at 11:21 UTC
FIRST EPSS: Complete at observationRead 14 Oct 2026 at 11:21 UTC
Public exploit code: Complete at observationRead 14 Oct 2026 at 11:21 UTC

Coverage describes the sources at this observation. A complete read then does not establish their current position.

What changed

First observed 14 Oct 2026

No field changes in the recorded history.

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