CVE-2026-96957

Analyzed Analyzed - Analysis Complete

Improper Cryptographic Signature Verification in .NET Framework

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-13

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-96957

EUVD

EUVD-2026-100278

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	.net	11.0.0
microsoft	.net	11.0.0
microsoft	.net	11.0.0
microsoft	.net	11.0.0
microsoft	.net	11.0.0
microsoft	.net	11.0.0
microsoft	.net	11.0.0
microsoft	.net	11.0.0
microsoft	.net	From 10.0.0 (inc) to 10.0.13 (exc)
microsoft	visual_studio_2022	From 17.14.0 (inc) to 17.14.42 (exc)
microsoft	visual_studio_2026	From 18.10.0 (inc) to 18.10.4 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-347	The product does not verify, or incorrectly verifies, the cryptographic signature for data.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper verification of cryptographic signatures in .NET. An unauthorized attacker can exploit this over a network to bypass a security feature.

Impact Analysis

An attacker could bypass security protections, potentially gaining unauthorized access to systems or data. This may lead to data breaches, privilege escalation, or other malicious activities depending on the affected .NET applications.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate compliance requirements under GDPR, HIPAA, or other regulations. Organizations using affected .NET versions may face legal and regulatory penalties.

Mitigation Strategies

Apply the latest security updates from Microsoft for .NET 10.0, .NET 11.0, Visual Studio 2022 version 17.14, and Visual Studio 2026 version 18.10 to address the improper cryptographic signature verification issue.

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