CVE-2017-7494
Samba Remote Code Execution Vulnerability
- Critical 9.8
- Exploited: added to CISA KEV 30 Mar 2023
- Used in ransomware campaigns
- A public exploit reference is listed
Description
Samba since version 3.5.0 and before 4.6.4, 4.5.10 and 4.4.14 is vulnerable to remote code execution vulnerability, allowing a malicious client to upload a shared library to a writable share, and then cause the server to load and execute it.
Key facts
- Published
- 30 May 2017
- Last changed
- 21 Oct 2025
- Assigned by
- redhat
- KEV added
- 30 Mar 2023
- KEV fix due
- 20 Apr 2023
- Used in ransomware
- Yes, according to CISA
- EPSS
- 99.448% likely to be exploited in the next 30 days, higher than 99.943% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: yes; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 9.8CVSS 3.1, Criticalfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Samba | samba |
|
Timeline
- 30 May 2017 Published
- 30 Mar 2023 CVE-2017-7494 added to CISA KEV
- 30 Mar 2023 Added to the CISA KEV catalogue