CVE-2021-42314Network attack vector

Authenticated remote code execution

Published Dec 15, 2021 · Updated Nov 18, 2024

Remote code execution in Microsoft Defender for IoT before 10.5.2 allows remote authenticated users to execute arbitrary code via unspecified vectors. Microsoft has not published the vulnerable component or operation, so the mechanism remains undisclosed in available records. The CVSS record requires network access and low privileges without user interaction; successful exploitation can compromise confidentiality, integrity, and availability.

CVSS severity8.8
High
EPSS probability2.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Microsoft Defender for IoT before 10.5.2 allows remote authenticated users to execute arbitrary code via unspecified vectors. Microsoft has not published the vulnerable component or operation, so the mechanism remains undisclosed in available records. The CVSS record requires network access and low privileges without user interaction; successful exploitation can compromise confidentiality, integrity, and availability.

The record

CVE
CVE-2021-42314
Published
Dec 15, 2021
Updated
Nov 18, 2024
Vendor
Microsoft
Product
Microsoft Defender for IoT
Classifications
Unavailable
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 15, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 18, 2024Record 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=22.0.0 <10.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Microsoft Defender for IoTversion=22.0.0 <10.5.2

Published CVSS scores

6.5NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8MicrosoftCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
Privilegesauthenticated
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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