CVE-2026-62918
Received Received - Intake

Improper Cryptographic Signature Verification in Microsoft Teams

Publication date: 2026-08-07

Last updated on: 2026-08-07

Assigner: Microsoft Corporation

Description
Improper verification of cryptographic signature in Microsoft Teams allows an unauthorized attacker to perform spoofing over a network.

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Meta Information

Published
2026-08-07
Last Modified
2026-08-07
Generated
2026-08-07
AI Q&A
2026-08-07
EPSS Evaluated
N/A
NVD
CVE-2026-62918

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft teams *

Helpful Resources

Exploitability

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

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Executive Summary

This vulnerability involves improper verification of cryptographic signatures in Microsoft Teams. An attacker can exploit this to perform spoofing attacks over a network, potentially impersonating legitimate users or services.

Impact Analysis

An attacker could impersonate a trusted user or service in Microsoft Teams, leading to unauthorized access, data breaches, or misinformation being spread within your organization.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate compliance requirements under GDPR, HIPAA, or other regulations due to improper data protection and authentication.

Mitigation Strategies

Apply the latest security update from Microsoft for Teams as soon as possible to fix the improper cryptographic signature verification issue.

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