CVE-2021-24032

Name: CVE-2021-24032
Creator: NVD / NIST
Published: 2021-03-04T21:15:12.963+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.7/10EPSS 0.35%

Last modified Jun 17, 2026

CVE-2021-24032 is a medium-severity vulnerability rated 4.7/10 on the CVSS scale. Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.. EPSS estimates a 0.35% chance of exploitation in the next 30 days.

Description

Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.

Metrics

CVSS 3.1

4.7/10

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

EPSS Probability

0.35%

26.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Facebook	Zstandard	>= 1.4.1, < 1.4.9

References

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982519Patch, Third Party Advisory
https://github.com/facebook/zstd/issues/2491Issue Tracking, Patch, Third Party Advisory
https://www.facebook.com/security/advisories/cve-2021-24032Third Party Advisory
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982519Patch, Third Party Advisory
https://github.com/facebook/zstd/issues/2491Issue Tracking, Patch, Third Party Advisory
https://www.facebook.com/security/advisories/cve-2021-24032Third Party Advisory

Timeline

Published: Mar 4, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24032?

How severe is CVE-2021-24032?

CVE-2021-24032 has a CVSS score of 4.7/10 (MEDIUM severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24032?

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-2021-24032?

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

Scan your code now

Source: NVD / NIST