CVE-2009-1886: Multiple format string vulnerabilities in client/client.c in smbclient in Samba 3.2.0 through 3.2.12 might...

Security readout for executives and security teams

This flaw affects the Samba smbclient command-line client, not necessarily every Samba server role. A malicious or compromised SMB file source could use specially crafted filenames to trigger format string handling bugs and potentially run code in the smbclient user context. The issue is old, but any remaining Samba 3.2.0 through 3.2.12 client installs should be treated as exposed. Exposure is most likely on systems or automation that run vulnerable smbclient versions against untrusted, attacker-controlled, or compromised SMB shares. Server-only Samba deployments are not established as affected by the supplied description unless the vulnerable smbclient binary is present and used. Prioritize remediation where smbclient is used in automated file-transfer workflows, administrative scripts, or partner-facing operations. The vulnerability is old, but the potential impact is serious if vulnerable clients still process attacker-controlled filenames. Mitigation focus: Inventory Samba and smbclient versions across Linux and Unix systems.; Upgrade Samba packages using vendor advisories for Debian, Ubuntu, Slackware, Mandriva, or Samba.; Apply the Samba CVE-2009-1886 patch only if vendor packages are unavailable..

Prepared

Jun 28, 2026, 10:45 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.