CVE-2017-0021

Name: CVE-2017-0021
Creator: NVD / NIST
Published: 2017-03-17T00:59:00.65+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.71%

Last modified Jun 17, 2026

CVE-2017-0021 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.71% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

1.71%

74.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Microsoft	Windows 10	1607
Microsoft	Windows Server 2016	All versions

References

http://www.securityfocus.com/bid/96020Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037999
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0021Mitigation, Patch, Vendor Advisory
http://www.securityfocus.com/bid/96020Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037999
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0021Mitigation, Patch, Vendor Advisory

Timeline

Published: Mar 17, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-0021?

How severe is CVE-2017-0021?

Severity scoring for CVE-2017-0021 is pending analysis. The EPSS model estimates a 1.71% probability of exploitation in the next 30 days.

How do I fix CVE-2017-0021?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-0021?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST