CVE-2026-57098

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Improper Cryptographic Signature Verification in Windows RDP Client

Publication date: 2026-09-08

Last updated on: 2026-09-08

Assigner: Microsoft Corporation

Description

Improper verification of cryptographic signature in Windows RDP Client allows an unauthorized attacker to disclose information over a network.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-08

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-57098

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_rdp_client	*

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 the Windows RDP Client. An attacker could exploit this to bypass security checks and disclose sensitive information over a network without proper authentication.

Impact Analysis

An attacker could intercept or access confidential data transmitted via RDP sessions. This may lead to unauthorized disclosure of sensitive information such as credentials or files.

Compliance Impact

This vulnerability could result in unauthorized data exposure, violating GDPR and HIPAA requirements for data confidentiality and integrity. Organizations may face compliance violations and penalties.

Mitigation Strategies

Apply the latest security updates from Microsoft for the Windows RDP Client to ensure proper cryptographic signature verification is in place.

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