CVE-2026-33823
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Improper Authorization in Microsoft Teams

Publication date: 2026-05-07

Last updated on: 2026-05-08

Assigner: Microsoft Corporation

Description
Improper authorization in Microsoft Teams allows an authorized attacker to disclose information over a network.
CVSS Scores
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Meta Information
Published
2026-05-07
Last Modified
2026-05-08
Generated
2026-06-19
AI Q&A
2026-05-08
EPSS Evaluated
2026-06-18
NVD
CVE-2026-33823
EUVD
EUVD-2026-28450
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-285 The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
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Executive Summary

This vulnerability is an improper authorization issue in Microsoft Teams. It allows an authorized attacker to disclose information over a network, meaning that someone with some level of access can exploit this flaw to access or reveal information they should not be able to.

Impact Analysis

The impact of this vulnerability is significant because it can lead to unauthorized disclosure of sensitive information. According to the CVSS score of 9.6, it has high confidentiality and integrity impacts, meaning attackers can access and potentially manipulate sensitive data without authorization, which could compromise privacy and security.

Compliance Impact

This vulnerability in Microsoft Teams involves improper authorization that allows an authorized attacker to disclose information over a network. Such unauthorized disclosure of information can lead to violations of data protection regulations and standards that require confidentiality and integrity of sensitive data, such as GDPR and HIPAA.

Given the high impact on confidentiality (C:H) and integrity (I:H) indicated by the CVSS score, organizations using affected versions of Microsoft Teams may face increased risk of non-compliance with these regulations if sensitive personal or health information is exposed.

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