{"cve":"CVE-2021-43566","nvd":{"published":"2022-01-11T16:15:07.813","modified":"2026-06-17T04:11:08.900","status":"Modified","description":"All versions of Samba prior to 4.13.16 are vulnerable to a malicious client using an SMB1 or NFS race to allow a directory to be created in an area of the server file system not exported under the share definition. Note that SMB1 has to be enabled, or the share also available via NFS in order for this attack to succeed.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","score":2.5},"cwes":["CWE-362"],"references":["https://bugzilla.samba.org/show_bug.cgi?id=13979","https://security.netapp.com/advisory/ntap-20220110-0001/","https://www.samba.org/samba/security/CVE-2021-43566.html","https://bugzilla.samba.org/show_bug.cgi?id=13979","https://security.netapp.com/advisory/ntap-20220110-0001/"],"products":["samba:samba"],"source":"nvd","synced_at":"2026-10-19T21:26:33.761856376+00:00"},"epss":{"cve":"CVE-2021-43566","score":0.00376,"percentile":0.31624,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}