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CVE Vulnerability Details :

CVE-2026-21535

PUBLISHED

More Info Official Page

Assigner-microsoft

Assigner Org ID-f38d906d-7342-40ea-92c1-6c4a2c6478c8

Published At-19 Feb, 2026 | 22:06

Updated At-19 Feb, 2026 | 22:06

▼CVE Numbering Authority (CNA)

Microsoft Teams Information Disclosure Vulnerability

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

Affected Products

Vendor

Microsoft Corporation

Product

Microsoft Teams

Versions

Affected

Problem Types

Type	CWE ID	Description
CWE	CWE-284	CWE-284: Improper Access Control

Type: CWE

CWE ID: CWE-284

Description: CWE-284: Improper Access Control

Metrics

Version	Base score	Base severity	Vector
3.1	8.2	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C

Version: 3.1

Base score: 8.2

Base severity: HIGH

Vector:

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C

References

Hyperlink	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21535	vendor-advisory patch

Hyperlink: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21535

Resource:

vendor-advisory

patch

Affected Products

Affected

Problem Types

Metrics

Metrics Other Info

Impacts

Solutions

Configurations

Workarounds

Exploits

Credits

Timeline

Replaced By

Rejected Reason

References