CVE-2021-43566: Samba

Low severity, CVSS 2.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Samba Samba: before 4.13.16 (fixed in 4.13.16)

Published 2022-01-11. Last modified 2026-06-17.