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Samba Version Weakness Detection

2 min read Mar 7, 2026

When the target is Samba rather than Windows, version and build details matter more because old Samba releases can keep weak defaults, legacy protocol support, and older remote flaws in scope. Your current SMB vulnerability pages already cover broad known-vuln scanning, SMBv1, and signing, so this page is for deciding when a Samba host belongs in that legacy path at all.

Start by fingerprinting the service.

┌──(kali㉿kali)-[~]
└─$ nmap -Pn -p 139,445 -sV --script smb-os-discovery $TARGET_IP
┌──(kali㉿kali)-[~]
└─$ nxc smb $TARGET_IP

Then pull the protocol and signing posture.

┌──(kali㉿kali)-[~]
└─$ nmap -Pn -p 445 --script smb-protocols,smb-security-mode,smb2-security-mode $TARGET_IP

You are looking for combinations that keep older attack paths open, especially Samba plus SMBv1 plus weak signing behavior. That mix is more important than the banner alone. Nmap’s SMB security scripts are specifically meant to surface dialect support and signing configuration across SMB versions.

If the version string is specific enough, keep the host in the legacy or CVE review path. Do not guess from a vague Samba family string alone. If the target only leaks a generic Samba banner, keep the finding at weak protocol or weak signing unless you have stronger version evidence.

If an old Samba build also exposes anonymous shares, guest access, or writable paths, the service becomes much more valuable because the misconfiguration gives you immediate access even before any version-specific vulnerability matters.

References