Medium severity5.5NVD Advisory· Published Mar 4, 2021· Updated Jun 17, 2026

CVE-2021-24031

Description

In the Zstandard command-line utility prior to v1.4.1, output files were created with default permissions. Correct file permissions (matching the input) would only be set at completion time. Output files could therefore be readable or writable to unintended parties.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Facebook/Zstandard3 versions
cpe:2.3:a:facebook:zstandard:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:facebook:zstandard:*:*:*:*:*:*:*:*range: <1.4.1
- (no CPE)range: <1.4.1
- (no CPE)range: unspecified
Facebook/zstdllm-create
Range: <1.4.1
osv-coords3 versions
pkg:rpm/opensuse/zstd&distro=openSUSE%20Leap%2015.2 pkg:rpm/suse/zstd&distro=SUSE%20Linux%20Enterprise%20Micro%205.0 pkg:rpm/suse/zstd&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2
< 1.4.4-lp152.2.3.1+ 2 more
- (no CPE)range: < 1.4.4-lp152.2.3.1
- (no CPE)range: < 1.4.4-1.6.1
- (no CPE)range: < 1.4.4-1.6.1

Patches

Vulnerability mechanics

References

bugs.debian.org/cgi-bin/bugreport.cginvdExploitIssue TrackingMailing ListThird Party Advisory
github.com/facebook/zstd/issues/1630nvdExploitIssue TrackingThird Party Advisory
www.facebook.com/security/advisories/cve-2021-24031nvdVendor Advisory

News mentions

No linked articles in our index yet.

cvss	0.358
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000