Command Injection Affecting samba package, versions [,4.24.3)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published31 May 2026
- disclosed26 May 2026
- creditUnknown
Introduced: 26 May 2026
CVE-2026-4408 (opens in a new tab)How to fix?
Upgrade samba to version 4.24.3 or higher.
Overview
Affected versions of this package are vulnerable to Command Injection via the check password script process when the unescaped '%u' substitution character is used. An attacker can execute arbitrary commands on the system by injecting shell meta-characters into the username. This is only exploitable if the samba-dcerpcd service is started as a system service and the non-default configuration with the vulnerable script is enabled. Active Directory Domain Controllers are not affected.