CVE-2017-7494

Name: CVE-2017-7494
Creator: NVD / NIST
Published: 2017-05-30T18:29:00.19+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 99.45%

Last modified Jun 17, 2026

CVE-2017-7494 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 99.45% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

99.45%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Apr 20, 2023.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Samba	Samba	>= 3.5.0, < 4.4.0
Samba	Samba	>= 4.4.0, < 4.4.14
Samba	Samba	>= 4.5.0, < 4.5.10
Samba	Samba	>= 4.6.0, < 4.6.4
Debian	Debian Linux	8.0

References

http://www.debian.org/security/2017/dsa-3860Third Party Advisory
http://www.securityfocus.com/bid/98636Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038552Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2017:1270Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1271Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1272Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1273Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1390Third Party Advisory
https://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
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbns03755en_usThird Party Advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03759en_usThird Party Advisory
https://security.gentoo.org/glsa/201805-07Third Party Advisory
https://security.netapp.com/advisory/ntap-20170524-0001/Third Party Advisory
https://www.exploit-db.com/exploits/42060/Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/42084/Third Party Advisory, VDB Entry
https://www.samba.org/samba/security/CVE-2017-7494.htmlPatch, Vendor Advisory
http://www.debian.org/security/2017/dsa-3860Third Party Advisory
http://www.securityfocus.com/bid/98636Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038552Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2017:1270Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1271Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1272Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1273Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1390Third Party Advisory
https://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
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbns03755en_usThird Party Advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03759en_usThird Party Advisory
https://security.gentoo.org/glsa/201805-07Third Party Advisory
https://security.netapp.com/advisory/ntap-20170524-0001/Third Party Advisory
https://www.exploit-db.com/exploits/42060/Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/42084/Third Party Advisory, VDB Entry
https://www.samba.org/samba/security/CVE-2017-7494.htmlPatch, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-7494US Government Resource

Timeline

Published: May 30, 2017
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2017-7494?

How severe is CVE-2017-7494?

CVE-2017-7494 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 99.45% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2017-7494?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-7494?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST