CVE-2016-2119: Samba

High severity, CVSS 7.5. EPSS: 3.1% chance of exploitation in the next 30 days.

libcli/smb/smbXcli_base.c in Samba 4.x before 4.2.14, 4.3.x before 4.3.11, and 4.4.x before 4.4.5 allows man-in-the-middle attackers to bypass a client-signing protection mechanism, and consequently spoof SMB2 and SMB3 servers, via the (1) SMB2_SESSION_FLAG_IS_GUEST or (2) SMB2_SESSION_FLAG_IS_NULL flag.

Affected products

• Samba Samba: from 4.0.0, before 4.2.14 (fixed in 4.2.14); from 4.3.0, before 4.3.11 (fixed in 4.3.11); from 4.4.0, before 4.4.5 (fixed in 4.4.5)

Published 2016-07-07. Last modified 2026-06-17.