CVE-2017-0146highunder attackransomware

CVE-2017-0146: high-severity vulnerability in Microsoft Corporation Windows SMB

Published 17 Mar 2017 · Updated 21 Oct 2025

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100Vexday Risk Score

Patch now. It under exploitation confirmed by CISA and has a working public exploit.

ssvc Actcvss 8.8epss 90%

from disclosure to weapon31 days

Published on NVDMar 17

1st PoC+31d

metasploitMar 14

CISA KEV+1834d

Action required by CISAfederal deadline: 2022-04-15

Apply updates per vendor instructions.

In short

A flaw in Windows SMB file-sharing protocol allows attackers to send specially crafted packets and run malicious code on affected computers without authentication. This is critical because SMB is commonly used for network file sharing, making millions of systems potentially vulnerable.

Technical detail

The SMBv1 server implementation in multiple Windows versions contains a memory corruption vulnerability exploitable via remote network packets without requiring authentication or user interaction. Successful exploitation grants arbitrary code execution in kernel context, affecting Windows Vista through Windows 10 and corresponding Server editions.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607; and Windows Server 2016 allows remote attackers to execute arbitrary code via crafted packets, aka "Windows SMB Remote Code Execution Vulnerability." This vulnerability is different from those described in CVE-2017-0143, CVE-2017-0144, CVE-2017-0145, and CVE-2017-0148.

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

Affected products

Microsoft Corporation · Windows SMB

public PoCs found — 9✓ VexDay Proof

exploitdb✓ VexDay Proofwww.exploit-db.com/exploits/47456 exploitdb✓ VexDay Proofwww.exploit-db.com/exploits/41891 exploitdb✓ VexDay Proofwww.exploit-db.com/exploits/43970 exploitdbwww.exploit-db.com/exploits/41987unverified cve_referencewww.exploit-db.com/exploits/41891/unverified cve_referencewww.exploit-db.com/exploits/43970/unverified cve_referencepacketstormsecurity.com/files/154690/DOUBLEPULSAR-Payload-Execution-Neutralization.htmlunverified cve_referencepacketstormsecurity.com/files/156196/SMB-DOUBLEPULSAR-Remote-Code-Execution.htmlunverified cve_referencewww.exploit-db.com/exploits/41987/unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

Related CVEs — Microsoft Corporation Windows SMB

In the same product, most dangerous first.

CVE-2017-0147HIGHCVE-2017-0147EPSS 99.7%KEV CVE-2017-0148HIGHCVE-2017-0148EPSS 99.4%KEV CVE-2017-0144HIGHCVE-2017-0144EPSS 99.2%KEV CVE-2017-0143HIGHCVE-2017-0143EPSS 93.3%KEV CVE-2017-0145HIGHCVE-2017-0145EPSS 89.8%KEV

References

http://packetstormsecurity.com/files/154690/DOUBLEPULSAR-Payload-Execution-Neutralization.html http://packetstormsecurity.com/files/156196/SMB-DOUBLEPULSAR-Remote-Code-Execution.html https://cert-portal.siemens.com/productcert/pdf/ssa-701903.pdf https://cert-portal.siemens.com/productcert/pdf/ssa-966341.pdf https://ics-cert.us-cert.gov/advisories/ICSMA-18-058-02 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0146 https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-0146 https://www.exploit-db.com/exploits/41891/https://www.exploit-db.com/exploits/41987/https://www.exploit-db.com/exploits/43970/http://www.securityfocus.com/bid/96707 http://www.securitytracker.com/id/1037991