CVE-2022-21965Network attack vector

Unauthenticated service interruption via undisclosed vectors

Published Feb 9, 2022 · Updated Jan 2, 2025

Denial of service in Microsoft Teams for iOS, Android, and Admin Center allows remote attackers to interrupt the affected service. Microsoft has not disclosed the affected component, the crafted input, or the operation that mishandles it. No authentication or user interaction is required, and the reported impact is limited to availability without data exposure or modification.

CVSS severity7.5
High
EPSS probability2.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Microsoft Teams for iOS, Android, and Admin Center allows remote attackers to interrupt the affected service. Microsoft has not disclosed the affected component, the crafted input, or the operation that mishandles it. No authentication or user interaction is required, and the reported impact is limited to availability without data exposure or modification.

The record

CVE
CVE-2022-21965
Published
Feb 9, 2022
Updated
Jan 2, 2025
Vendor
Microsoft
Product
Microsoft Teams for Android
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Jan 2, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0 <1416/1.0.0.2021040701

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Teams for Androidversion=1.0.0 <1416/1.0.0.2021040701
Microsoft · Microsoft Teams Admin Centerversion=1.0.0 <publication
Microsoft · Microsoft Teams for iOSversion=2.0.0 <2.5.0

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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