MSRC-CVE-2026-33823 — Microsoft Team Events Portal Information Disclosure Vulnerability

Summary

Impact: Information Disclosure. Microsoft rating: Critical. Not known to be exploited. Customer action: Not required.

Details

Why are there no links to an update or instructions with steps that must be taken to protect from this vulnerability?
This vulnerability has already been fully mitigated by Microsoft. There is no action for users of this service to take. The purpose of this CVE is to provide further transparency.
Please see Toward greater transparency: Unveiling Cloud Service CVEs for more information.

Vulnerabilities 1

Critical 9.6

CVE-2026-33823

Microsoft Team Events Portal Information Disclosure Vulnerability

Improper authorization in Microsoft Teams allows an authorized attacker to disclose information over a network.

Microsoft Microsoft Teams

May 7, 2026

Revision history

2026-05-07 #1
Information published.

References

CVE-2026-33823 Microsoft Team Events Portal Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33823
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss