Local users can perform a local root exploit via smb4k mounthelper
Priority LOW 33CWE-73Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00121 1st percentileScored 2026-11-07
Fix Fixed smb4k (https://github.com/KDE/): 4.0.5
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| https://github.com/KDE/ | smb4k | ? to before 4.0.5 | 4.0.5 | Patch available | CNA |
- smb4k Vendorhttps://github.com/KDE/ Affected ? to before 4.0.5 Fixed in 4.0.5 Patch available CNA
Remediation
- Fix · CNA smb4k (https://github.com/KDE/) Fixed in 4.0.5
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
https://github.com/KDE/ smb4k 4.0.5
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2025-40539 Local users can perform arbitrary unmounts via smb4k mount helper due to lack of input validationPriority LOW 30
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2025-66003
- 2026-10-03 Alias added: GHSA-c32g-xjp2-p4pw
References
More https://github.com/KDE/ vulnerabilities
- TI-2025-40539 Local users can perform arbitrary unmounts via smb4k mount helper due to lack of input validation CVSS 4.0MEDIUM 6.9
Sources
- CVE-2025-66003 · CVE Program
- CVE-2025-66003 · NVD
- FIRST EPSS
- GHSA-c32g-xjp2-p4pw · GitHub Advisory Database · CC BY 4.0
- CVE-2025-66003 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences