Vulnerability · Published Jan 8, 2026 · Assigned by suse
CVE-2025-66003Local users can perform a local root exploit via smb4k mounthelper
High 7.3
In plain English
A high-severity security flaw in smb4k from https://github.com/KDE/. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)7.3High
Exploit odds (30 days)0.1%top 98.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An External Control of File Name or Path vulnerability in smb4k allowsl ocal users to perform a local root exploit via smb4k mounthelper if they can access and control the contents of a Samba shareThis issue affects smb4k: from ? before 4.0.5.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | smb4k | 4.0.0-1+deb13u1 | DEBIAN-CVE-2025-66003 |
| Debian:13 | smb4k | 4.0.0-1+deb13u1 | DSA-6092-1 |
| Debian:14 | smb4k | 4.0.5-1 | DEBIAN-CVE-2025-66003 |
| Ubuntu:22.04:LTS | smb4k | no fix listed | UBUNTU-CVE-2025-66003 |
| Ubuntu:24.04:LTS | smb4k | no fix listed | UBUNTU-CVE-2025-66003 |
| Ubuntu:25.10 | smb4k | no fix listed | UBUNTU-CVE-2025-66003 |
| Ubuntu:26.04:LTS | smb4k | no fix listed | UBUNTU-CVE-2025-66003 |
| Ubuntu:26.10 | smb4k | no fix listed | UBUNTU-CVE-2025-66003 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| https://github.com/KDE/ | smb4k | ? – before 4.0.5 |
Weakness: CWE-73 · Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N