CVE-2026-62896
Analyzed Analyzed - Analysis Complete

Improper Authentication in Microsoft Teams

Publication date: 2026-08-07

Last updated on: 2026-08-07

Assigner: Microsoft Corporation

Description
Improper authentication in Microsoft Teams allows an authorized attacker to elevate privileges over a network.

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Meta Information

Published
2026-08-07
Last Modified
2026-08-07
Generated
2026-08-27
AI Q&A
2026-08-07
EPSS Evaluated
2026-08-26
NVD
CVE-2026-62896

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-287 When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

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Executive Summary

This vulnerability is an improper authentication issue in Microsoft Teams that allows an authorized attacker to escalate their privileges over a network. This means an attacker with some access could gain higher-level permissions without proper validation.

Impact Analysis

If exploited, this flaw could let attackers gain elevated access to Microsoft Teams, potentially allowing them to view sensitive communications, modify data, or perform actions with higher privileges than intended. Users with standard access could be at risk of privilege escalation.

Compliance Impact

The vulnerability allows unauthorized privilege escalation in Microsoft Teams, which could lead to unauthorized access to sensitive data. This may violate compliance requirements under GDPR (data protection) and HIPAA (healthcare data privacy) by enabling unauthorized data exposure or modification.

Mitigation Strategies

Apply the latest security updates from Microsoft for Teams immediately to address the improper authentication flaw. Monitor Microsoft's official advisory for patches and verify installation on all affected systems.

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