CVE-2017-7494
KEVRansomware UseSamba Remote Code Execution Vulnerability
Description
Samba contains a 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.
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.
CVSS 3.1 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HPublishedMay 30, 2017
Last modifiedJun 17, 2026
Added to KEVMar 30, 2023
Remediation dueApr 20, 2023
References
- debian.org/security/2017/dsa-3860Third Party Advisory
- securityfocus.com/bid/98636Third Party AdvisoryVDB Entry
- securitytracker.com/id/1038552Third Party AdvisoryVDB Entry
- access.redhat.com/errata/RHSA-2017:1270Third Party Advisory
- access.redhat.com/errata/RHSA-2017:1271Third Party Advisory
- access.redhat.com/errata/RHSA-2017:1272Third Party Advisory
- access.redhat.com/errata/RHSA-2017:1273Third Party Advisory
- access.redhat.com/errata/RHSA-2017:1390Third Party Advisory
- download.schneider-electric.com/files?p_enDocType=Technical+leaflet&p_File_Name=SEVD-2018-095-01+Security+Notification+Umotion+V1.1.pdf&p_Doc_Ref=SEVD-2018-095-01Third Party Advisory
- h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbns03755en_usThird Party Advisory
- h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03759en_usThird Party Advisory
- security.gentoo.org/glsa/201805-07Third Party Advisory
0 recent articles mention this CVE
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Risk assessment · Critical
Actively exploited and used by ransomware crews. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1286 days
- Ransomware
- Used in known ransomware campaigns
- CVSS
- 9.8 CRITICAL
- EPSS (30-day exploit probability)
- 99.4% · top 1% of all CVEs
- Weakness
- CWE-94
- Attack vector
- Network, remotely reachable
- Preconditions
- No privileges and no user interaction
Recommended actions
- 1.Apply updates per vendor instructions.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
- 5.Verify offline/immutable backups and segment the affected systems. This flaw is used for ransomware initial access.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.