CVE-2018-8226

Name: CVE-2018-8226
Creator: NVD / NIST
Published: 2018-06-14T12:29:01.787+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 12.70%

Last modified Jun 17, 2026

CVE-2018-8226 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 12.70% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

12.70%

95.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Microsoft	Windows 10	All versions
Microsoft	Windows 10	1607
Microsoft	Windows 10	1703
Microsoft	Windows 10	1709
Microsoft	Windows 10	1803
Microsoft	Windows Server 1803	All versions
Microsoft	Windows Server 2016	All versions
Microsoft	Windows Server 2016	1709

References

http://www.securityfocus.com/bid/104361Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041094Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8226Patch, Vendor Advisory
http://www.securityfocus.com/bid/104361Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041094Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8226Patch, Vendor Advisory

Timeline

Published: Jun 14, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-8226?

How severe is CVE-2018-8226?

Severity scoring for CVE-2018-8226 is pending analysis. The EPSS model estimates a 12.70% probability of exploitation in the next 30 days.

How do I fix CVE-2018-8226?

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-2018-8226?

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

Scan your code now

Source: NVD / NIST