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Vulnerabilities

Vulnerability · CVE-2025-66003

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

Published Jan 8, 2026 · catalog updated Jan 8, 2026 · https://github.com/KDE/

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-66003. EPSS is 0.12%. Act only if a listed version of https://github.com/KDE/ is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.12%
Remediation
Version ranges on file
Affected products
vendor https://github.com/KDE/ smb4k ? <4.0.5

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor https://github.com/KDE/ smb4k ? <4.0.5? <4.0.5

How to fix CVE-2025-66003

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-66003. EPSS is 0.12%. Act only if a listed version of https://github.com/KDE/ is installed.

Which versions are affected?

Compare what you have installed with https://github.com/KDE/ smb4k ? <4.0.5 ? <4.0.5. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.12%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 8, 2026 · EUVD

    Detected

    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.

  2. Jan 8, 2026 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2025-66003

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-66003

    30-day exploitation probability 0.12%

    first.org
  • EUVDVulnerability recordEUVD-2026-1571

    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.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 6, 2026
  • CVE.orgOct 31, 2026
  • EUVDOct 30, 2026