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CVE-2026-33823Critical

Microsoft Team Events Portal Information Disclosure Vulnerability

MSRC advisory NVD CVE.org

Assessment

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

Severity
Critical
CVSS base score
9.6CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C
Impact
Information Disclosure
EPSS, next 30 days
0.9%Higher than 57% of scored CVEs · FIRST model run 29 Sep 2026 · about EPSS
Public exploit code
No Nuclei template lists it
Exploitability
Not assessed
Publicly disclosed
No
Customer action
Not required (service-side fix)
Component
Microsoft Teams
Weakness
CWE-285: Improper Authorization
Issued by
Microsoft
Published
7 May 2026 · May 2026
Last revised
7 May 2026

Updates that fix it

0 KBs

No KB listed

MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.

Affected products

Microsoft Office
1 affected product
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