CVE-2017-7494

Exp

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.

Published: 2017-05-30 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-7494 is rated Critical Active Threat (100/100): CVSS Critical severity, with high exploitation likelihood (EPSS 99.45%, 100th percentile). CISA KEV confirms active exploitation (added 2023-03-30) affecting Samba / Samba. a weakness (CWE-94) Unauthenticated remote administrative access may be possible. EPSS rose +5.21% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2017-7494

Name: Samba Remote Code Execution Vulnerability · CISA KEV detail

Exploit added: 2023-03-30

Action due: 2023-04-20

Required action: Apply updates per vendor instructions.

Public exploit references (Exploit-DB) for CVE-2017-7494

EDB-ID Source Kind Published Link
42084 exploit_db edb 2017-05-29 Exploit-DB ↗
42060 exploit_db edb 2017-05-24 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2017-7494

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 94.24% 99.45% +5.21%
2 2025-11-21 93.63% 94.24% +0.61%
3 2025-11-18 — 93.63% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-7494

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2017-7494

OS Trackers for CVE-2017-7494

vendor priority summary link
alpine — CVE-2017-7494: 1 source package rows (samba); 5 state rows across 5 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 0, open 5. https://security.alpinelinux.org/vuln/CVE-2017-7494
debian not yet assigned CVE-2017-7494 not yet assigned priority: Debian including 1 source packages (samba), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-7494
gentoo normal CVE-2017-7494: 1 GLSA(s) (201805-07), 1 atom(s) (net-fs/samba); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-7494
redhat high — https://access.redhat.com/security/cve/CVE-2017-7494
suse high CVE-2017-7494 severity important: SUSE including 1179 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 2248 product×package rows across 67 product lines (HPE Helion OpenStack 8, SUSE Liberty Linux 7, … (67 product lines)): Fixed 1557, Known Not Affected 534, Known Affected 157. https://www.suse.com/security/cve/CVE-2017-7494/
ubuntu high CVE-2017-7494 high priority: Ubuntu including 1 source packages (samba), 5 status rows across 5 suites (trusty, upstream, xenial, yakkety, zesty): released 4, needs-triage 1. https://ubuntu.com/security/CVE-2017-7494

Affected software / configurations for CVE-2017-7494

Vendor Product Version Raw CPE
samba samba >= 3.5.0, < 4.4.0 cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
samba samba >= 4.4.0, < 4.4.14 cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
samba samba >= 4.5.0, < 4.5.10 cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
samba samba >= 4.6.0, < 4.6.4 cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

References for CVE-2017-7494

URL Tags
http://www.debian.org/security/2017/dsa-3860 Third Party Advisory
http://www.securityfocus.com/bid/98636 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1038552 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2017:1270 Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1271 Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1272 Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1273 Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1390 Third 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-2018-095-01 Third Party Advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbns03755en_us Third Party Advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03759en_us Third Party Advisory
https://security.gentoo.org/glsa/201805-07 Third 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.html Patch Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-7494 US Government Resource
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