What’s Vulnerable › Vulnerabilities

CVE-2022-21965: Microsoft Teams Denial of Service Vulnerability

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-02-09 · updated 2026-06-17

Description

Microsoft Teams Denial of Service Vulnerability

Affected products

• Microsoft Teams: before 1.0.94.20000 — fixed in 1.0.94.20000
• Microsoft Teams Admin Center: from 1.0.0 before publication — fixed in publication
• Microsoft Teams: from 2.0.0 before 2.5.0 — fixed in 2.5.0

How to fix

Upgrade to a fixed version: Microsoft Teams 1.0.94.20000; Microsoft Teams Admin Center publication; Microsoft Teams 2.5.0. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21965
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21965

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