CVE-2021-24031

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.

• CWE-277
• CWE-276

• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=981404Exploit, Issue Tracking, Mailing List, Third Party Advisory
• https://github.com/facebook/zstd/issues/1630Exploit, Issue Tracking, Third Party Advisory
• https://www.facebook.com/security/advisories/cve-2021-24031Vendor Advisory
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=981404Exploit, Issue Tracking, Mailing List, Third Party Advisory
• https://github.com/facebook/zstd/issues/1630Exploit, Issue Tracking, Third Party Advisory
• https://www.facebook.com/security/advisories/cve-2021-24031Vendor Advisory

Published

Mar 4, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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