Medium severity · published May 7, 2026
CVE-2026-33823
Microsoft Team Events Portal Information Disclosure Vulnerability
6.5
CVSS
0.7%
EPSS
No
On KEV
Description
Improper authorization in Microsoft Teams allows an authorized attacker to disclose information over a network.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MT
Microsoft Teams · Microsoft
All versions, or not specified · source: vendor
TE
Teams · Microsoft
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33823
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33823
Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33823
More from Microsoft Teams
10.0
CVE-2026-65667
Microsoft Teams Elevation of Privilege Vulnerability
9.6
CVE-2026-62896
Microsoft Teams Elevation of Privilege Vulnerability
7.5
CVE-2026-62918
Microsoft Teams Spoofing Vulnerability
7.5
CVE-2026-21535
Microsoft Teams Information Disclosure Vulnerability