CVE-2026-4480 CRITICAL

CVE-2026-4480: Samba: samba: remote code execution in printing subsystem via unescaped job description

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-78
Published May 26, 2026
Last update June 30, 2026

CVSS base score

9.0/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

A flaw was found in the Samba printing subsystem. Samba passes the client-controlled job description string to the command configured with the "print command" setting via the "%J" substitution character without escaping shell meta characters. A remote attacker could exploit this vulnerability by sending a specially crafted print job description that contains unescaped shell characters. This could lead to remote code execution on the affected system.

Key dates

02Disclosure timeline

May 26, 2026 CVE published
June 30, 2026 Record updated