CVE-2017-0146 Microsoft Windows SMB Remote Code Execution

Exploited in the wild High 8.8 Published 17 Mar 2017 Updated 21 Oct 2025

Remote attackers can execute arbitrary code on Windows systems by sending crafted packets to the SMBv1 server.

Exploited in the wild: Since 25 Mar 2022
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2017-0146?

CVE-2017-0146 is a high-severity memory corruption vulnerability in Microsoft Corporation Windows SMB, published on 17 Mar 2017. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Which versions are affected by CVE-2017-0146?

It affects 9 products.

Products include Microsoft Server Message Block, Siemens Acuson P300 Firmware, Siemens Acuson P500 Firmware, Siemens Acuson Sc2000 Firmware, Siemens Acuson X700 Firmware, Siemens Syngo Sc2000 Firmware and 3 more.

How do I fix CVE-2017-0146?

No fix has been published for CVE-2017-0146 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 15 Apr 2022.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2017-0146 being exploited?

Yes. Attackers have exploited CVE-2017-0146 in the wild since at least 25 Mar 2022, including in ransomware campaigns.

Public exploit code: 5 Metasploit modules and 5 Exploit-DB entries.

Sources

Also known as GHSA-3c3r-82gp-wc94.