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CVE-2026-4408
CRITICAL(9.0)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Risk Signal Score23/100 — NIEDRIG
- CVSS 9 — Kritisch
EPSS-Score
1%
Exploit-Wahrscheinlichkeit (30 Tage)
CVSS Score
9
Technische Schwere
Beschreibung
A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers and classic domain controllers that use the "check password script" feature. If this script is configured with the %u substitution character, the client-controlled username is passed without proper escaping of shell meta-characters. This vulnerability allows an attacker to achieve remote command execution on the affected system. This issue primarily affects non-standard configurations where the "check password script" is used with %u and the samba-dcerpcd service is started as a system service.