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Vulnerability record · CVE-2018-0956 · published 12 April 2018

CVE-2018-0956: Microsoft windows 10 vulnerability

Microsoft · Windows 10

A denial of service vulnerability exists in the HTTP 2.0 protocol stack (HTTP.sys) when HTTP.sys improperly parses specially crafted HTTP 2.0 requests, aka "HTTP.sys Denial of Service Vulnerability." This affects Windows Server 2016, Windows 10, Windows 10 Servers.

7.5 CVSS 3.0 High EPSS 14% · top 3.6%
7.5CVSS 3.0 base score, v2 7.8
14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

A denial of service vulnerability exists in the HTTP 2.0 protocol stack (HTTP.sys) when HTTP.sys improperly parses specially crafted HTTP 2.0 requests, aka "HTTP.sys Denial of Service Vulnerability." This affects Windows Server 2016, Windows 10, Windows 10 Servers.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/103650 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040661 Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0956 PatchVendor Advisory
http://www.securityfocus.com/bid/103650 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040661 Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0956 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-0956), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.