Security Latest record .NET Framework Security Feature Bypass Vulnerability Recorded 15 Oct 2026 at 21:30 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position.
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The historical field “Public exploit code” recorded Nuclei detection-template membership. It did not establish exploit availability. The original recorded fields remain below.
The historical “Publicly disclosed: No” field could represent a missing MSRC assessment. It does not establish that the vulnerability was undisclosed. The original recorded fields remain below.
CVE Microsoft 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.
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 0.4%; scored 15 Oct 2026
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.
Microsoft security releases Complete at observationRead 15 Oct 2026 at 21:30 UTC
CISA KEV Complete at observationRead 15 Oct 2026 at 21:30 UTC
FIRST EPSS Complete at observationRead 15 Oct 2026 at 21:30 UTC
Public detection templates (Nuclei) Complete at observationRead 15 Oct 2026 at 21:30 UTC Coverage describes the sources at this observation. A complete read then does not establish their current position.
Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.
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15 Oct 2026 · 21:30:54 UTC
EPSS 0.4%; scored 14 Oct 2026 → 0.4%; scored 15 Oct 2026 15 Oct 2026 · 01:07:54 UTC
EPSS Not scored → 0.4%; scored 14 Oct 2026