CVE•Published 2017-03-17•Modified 2026-05-13•1 article on news•5 live references•NVD data

CVE-2017-0021Microsoft · Windows_10

Vulnerability data via NVD (ingested)

CVSS v3.1

9.0

CRITICAL

CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS percentile

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Description

Hyper-V in Microsoft Windows 10 1607 and Windows Server 2016 does not properly validate vSMB packet data, which allows attackers to execute arbitrary code on a target OS, aka "Hyper-V System Data Structure Vulnerability." This vulnerability is different from that described in CVE-2017-0095.

Timeline

Published 2017-03-17

Modified 2026-05-13

External references

NVD MITRE Exploit-DB GitHub PoC VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2017-0021

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · OS

os:"Windows 10"

Hosts Shodan identified as running Windows 10.

More intel sources (5)

Shodan report

vuln:CVE-2017-0021

Country / ASN / product breakdown for the vuln query.

Censys

vulnerabilities.cve_id: CVE-2017-0021