CVE-2026-21535

Improper access control in Microsoft Teams allows an unauthorized attacker to disclose information over a network.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21535	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:microsoft:teams:-:*:*:*:*:*:*:*

History

17 Jun 2026, 10:18

Type	Values Removed	Values Added
Summary		(es) Control de acceso inadecuado en Microsoft Teams permite a un atacante no autorizado divulgar información a través de una red.

20 Feb 2026, 17:39

Type	Values Removed	Values Added
First Time		Microsoft teams Microsoft
References	~~() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21535 -~~	() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21535 - Vendor Advisory
CPE		cpe:2.3:a:microsoft:teams:-:::::::*

19 Feb 2026, 23:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-19 23:16

Updated : 2026-06-17 10:18

NVD link : CVE-2026-21535

Mitre link : CVE-2026-21535

CVE.ORG link : CVE-2026-21535

JSON object : View

Products Affected

microsoft

teams

CWE

CWE-284

Improper Access Control

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