CVE-2021-42301

Name: CVE-2021-42301
Creator: NVD / NIST
Published: 2021-11-10T01:19:47.993+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.3/10EPSS 0.90%

Last modified Jun 17, 2026

CVE-2021-42301 is a low-severity vulnerability rated 3.3/10 on the CVSS scale. Azure RTOS Information Disclosure Vulnerability. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

Description

Azure RTOS Information Disclosure Vulnerability

Metrics

CVSS 3.1

3.3/10

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

EPSS Probability

0.90%

55.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Microsoft	Azure Rtos	< 6.1.9

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42301Patch, Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42301Patch, Vendor Advisory

Timeline

Published: Nov 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42301?

Azure RTOS Information Disclosure Vulnerability

How severe is CVE-2021-42301?

CVE-2021-42301 has a CVSS score of 3.3/10 (LOW severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42301?

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-2021-42301?

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

Scan your code now

Source: NVD / NIST