Vulnerability record

CVE-2017-0146

Microsoft Windows SMB Remote Code Execution Vulnerability

HighExploitation confirmedCISA KEV Used by ransomware

What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Windows, fix it now.

CISA required action: Apply updates per vendor instructions.

US federal civilian agencies must remediate by Apr 15, 2022.

Patch status

Official fix available since Sep 30, 2026

Apply the vendor's update to every affected system. Check the fixed-in versions below where known.

Basis: NVD patch reference

Patch or advisory on portal.msrc.microsoft.com (opens in a new tab)

Description

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.

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

Products affected by this vulnerability, with versions and the source of each entry
Product	Vendor	Source
Windows	Microsoft	KEV

Sources: KEV = CISA Known Exploited Vulnerabilities catalog. Version details have not been published yet.

Intelligence timeline

Developments from the last 30 days, newest first.

CVSS scoredUpdateKEVSep 30, 2026
CVE-2017-0146 scored CVSS 8.8: Microsoft Windows, Microsoft Windows SMB Remote Code Execution Vulnerability
CISA lists this as exploited in the wild and known to be used in ransomware campaigns. Unpatched Windows systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
Patch releasedUpdateKEVSep 30, 2026
Patch released for CVE-2017-0146: Microsoft Windows, Microsoft Windows SMB Remote Code Execution Vulnerability
An official fix is now available for Microsoft Windows. This vulnerability is being exploited, so apply it promptly.
Basis: NVD patch reference

1 earlier event is available with a subscription. See plans.

Coverage

We have not published a story about this vulnerability yet.

References

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