CVE-2026-21535
Received
Received - Intake
Improper Access Control in Microsoft Teams Enables Data Disclosure
Publication date: 2026-02-19
Last updated on: 2026-02-20
Assigner: Microsoft Corporation
Description
Description
Improper access control in Microsoft Teams allows an unauthorized attacker to disclose information over a network.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | teams | * |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-284 | The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. |
Attack-Flow Graph
AI Powered Q&A
How can this vulnerability impact me? :
An attacker exploiting this vulnerability could gain unauthorized access to sensitive information transmitted over the network, potentially leading to data breaches and loss of confidentiality.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
Can you explain this vulnerability to me?
This vulnerability is an improper access control issue in Microsoft Teams that allows an unauthorized attacker to disclose information over a network.
What immediate steps should I take to mitigate this vulnerability?
I don't know
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