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Known exploited vulnerability · CISA KEV

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

The SMBv1 server in Microsoft Windows allows remote attackers to perform remote code execution.

CVE-2017-0146

Exploited in the wild. Fix this first.

CISA added it to the Known Exploited Vulnerabilities catalog on 2022-03-25: attackers are using it right now. It is known to be used in ransomware campaigns.

CISA KEV
Listed
Added 2022-03-25 · federal fix-by 2022-04-15
EPSS (30 days)
90%
Higher than 99.8% of CVEs · 2026-11-01
CVSS v3.1
8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What CISA says

Microsoft Windows SMB Remote Code Execution Vulnerability

Apply updates per vendor instructions.

NVD description · published 2017-03-17

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.

Full record on NVD

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How to check if you are exposed to CVE-2017-0146

  1. Find every Microsoft Windows system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
  2. Compare each version with the fixed versions in the vendor advisory. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
  3. Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2017-0146.

US federal agencies had to fix this by 2022-04-15. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.

Affected versions

Versions the National Vulnerability Database lists as vulnerable to CVE-2017-0146. Check the vendor advisory for the exact fixed builds before you sign anything off.

ProductVulnerable versions
Microsoft Server Message Block1.0
Siemens Acuson P300 Firmware13.02; 13.03; 13.20; 13.21
Siemens Acuson P500 Firmwareva10; vb10
Siemens Acuson Sc2000 Firmwarefrom 4.0 up to and including 4.0e; 5.0a
Siemens Acuson X700 Firmware1.0; 1.1
Siemens Syngo Sc2000 Firmwarefrom 4.0 up to and including 4.0e; 5.0a

NVD lists 3 more affected products; see the full record on NVD.

Timeline

  1. · Published in the National Vulnerability Database
  2. · Added to CISA's Known Exploited Vulnerabilities catalog, 1,834 days after it was published
  3. · Fix-by date for US federal agencies, passed 1,661 days ago

Weakness type

More exploited Microsoft vulnerabilities

CISA lists 390 exploited Microsoft vulnerabilities. The closest matches:

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Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.

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