{"id":"CVE-2021-24032","title":"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","summary":"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 …","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-277","CWE-276"],"vendor":"facebook","product":"zstandard","affected":["zstandard >= 1.4.1, < 1.4.9"],"patched":["zstandard 1.4.9"],"published":"2021-03-04","updated":"2026-10-08","sourceUpdated":"2026-10-08T21:17:33.983","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-24032","references":[{"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982519","label":"cve-assign@fb.com"},{"url":"https://github.com/facebook/zstd/issues/2491","label":"cve-assign@fb.com"},{"url":"https://www.facebook.com/security/advisories/cve-2021-24032","label":"cve-assign@fb.com"},{"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982519","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/facebook/zstd/issues/2491","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.facebook.com/security/advisories/cve-2021-24032","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org"],"epss":0.00348,"epssPercentile":0.28298,"ingestedAt":"2026-10-08T22:11:53.726Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-08T20:59:25.866190Z"},"slug":"CVE-2021-24032","body":"## Overview\n\nBeginning 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.\n\n## Affected\n\n- `zstandard >= 1.4.1, < 1.4.9`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `zstandard 1.4.9`","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}