Permissions, Privileges, and Access Controls in smb4k - CVE-2025-66003
Published: January 2, 2026 / Updated: January 12, 2026
Vulnerability identifier: #VU120877
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-66003
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: KDE.org
Affected software:
smb4k
smb4k
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to application allows arbitrary mounts to be created within the Smb4KMountHelper::mount() function in smb4kmounthelper.cpp. A local user with ability to control content of a Samba network share can mount it over an existing local directory (e.g. /bin) and execute arbitrary code with root privileges.
How to mitigate CVE-2025-66003
Install updates from vendor's website.