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ExploitedIn CISA KEVFix available

CVE-2017-7494

Exploitation confirmed. First attested on 2023-03-30 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2017-05-30
  • Fixed in4.6.4 · 4.5.10 · 4.4.14 · 4.4.0
  • WeaknessCWE-94

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2017-05-3018:29CVE publishedNVD
  2. 2023-03-30Listed as exploited by GCVEGCVE
  3. 2023-03-30Exploitation first reportedCISA KEV
  4. 2023-03-30Added to the CISA KEV catalogCISA KEV
  5. 2025-02-0713:29SSVC exploitation set to activeCISA-ADP
  6. 2026-10-2319:23First public proof of conceptPoC-in-GitHub
  7. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-7494?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-7494?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Samba
BranchAffectedFixed in
4.6≥ 4.6.0, < 4.6.44.6.4
4.5≥ 4.5.0, < 4.5.104.5.10
4.4≥ 4.4.0, < 4.4.144.4.14
4.4≥ 3.5.0, < 4.4.04.4.0
Debian debian linux
BranchAffectedFixed in
8.0= 8.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Samba to 4.6.4 · 4.5.10 · 4.4.14 · 4.4.0
  2. CISA’s required action: Apply updates per vendor instructions.due 2023-04-20

Advisories and patches

Detection

read 2026-10-23 19:23 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
20 repositories, unverifiedbetab0t/cve-2017-7494homjxi0e/CVE-2017-7494opsxcq/exploit-CVE-2017-7494Waffles-2/SambaCrybrianwrf/SambaHunter
PoC-in-GitHub

CISA Known Exploited Vulnerability

Date Added
2023-03-30
Patch Due Date
2023-04-20
Ransomware Use
Known
Required Action
Apply updates per vendor instructions.

Sources

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2017-05-30
Last Modified
2026-06-17
NVD status
Analyzed

Frequently asked questions

What is CVE-2017-7494?

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.

Is CVE-2017-7494 actively exploited?

Yes. CVE-2017-7494 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2023-04-20.

What is the CVSS score for CVE-2017-7494?

CVE-2017-7494 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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