CVE-2021-43888

Name: CVE-2021-43888
Creator: NVD / NIST
Published: 2021-12-15T15:15:11.123+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.00%

Last modified Jun 17, 2026

CVE-2021-43888 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Microsoft Defender for IoT Information Disclosure Vulnerability. EPSS estimates a 3.00% chance of exploitation in the next 30 days.

Description

Microsoft Defender for IoT Information Disclosure Vulnerability

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

3.00%

85.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Microsoft	Defender For Iot	< 10.5.2

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43888Patch, Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43888Patch, Vendor Advisory

Timeline

Published: Dec 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43888?

Microsoft Defender for IoT Information Disclosure Vulnerability

How severe is CVE-2021-43888?

CVE-2021-43888 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.00% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43888?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43888?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST