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CVE-2026-4408

9.8 Critique

Publiée le 28/05/2026 à 11:16 · Modifiée le 08/10/2026 à 23:18 · Modifiée · Source : secalert@redhat.com

Description

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.

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Produits concernés

Scores CVSS

VersionScoreSourceVecteur
3.1 9.0 Critique secalert@redhat.com CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
3.1 9.8 Critique nvd@nist.gov (NVD) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1 9.0 Critique 0b0ca135-0b70-47e7-9f44-1890c2a1c46c CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Faiblesses (CWE)

Références

Ailleurs