CVE-2017-0146VulnerabilityPublished 03/25/2022Updated 10/24/2026

CVE-2017-0146: Microsoft Windows SMB Remote Code Execution Vulnerability

Affects Microsoft WindowsSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 03/25/2022
KEV deadline: 04/15/2022
Ransomware: Used in ransomware campaigns
EPSS: 89.8% chance of exploitation in 30 days – higher than 99% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2017-0146 (opens in a new tab)

Description

CVE-2017-0146 is a high-severity remote code execution vulnerability in the SMBv1 server component of Microsoft Windows. It allows remote attackers to execute arbitrary code on affected systems. This vulnerability has been exploited in the wild and is known to have been used in ransomware campaigns.

Summary

The SMBv1 server in Microsoft Windows contains a remote code execution vulnerability identified as CVE-2017-0146. This flaw enables remote attackers to execute arbitrary code by sending specially crafted packets to the SMBv1 server. The vulnerability has been actively exploited in the wild and leveraged in ransomware attacks, highlighting its critical impact on affected Windows systems.

Impact

Successful exploitation of this vulnerability allows remote attackers to execute arbitrary code on vulnerable Windows systems, potentially leading to full system compromise. It has been actively exploited in the wild and used in ransomware campaigns, indicating significant risk to affected environments.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since this vulnerability affects SMBv1, disabling SMBv1 on Windows systems is a recommended mitigation if patching is not immediately possible.

Weaknesses

CWE-20Improper Input Validation (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 10:56:49 UTC

Weaknesses

References

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