CVE-2018-8226
highpriority · track · 35EPSS 0.136 · 96 %ileEUUSEPSS · scored 2026-10-27
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.8
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (21)
Products and version ranges known to be affected.
- microsoft windows server 1803all versionsnvdUScpe:2.3:o:microsoft:windows_server_1803:*:*:*:*:*:*:*:*
- microsoft windows server 2016all versionsnvdUScpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (9)
External citations — patches, advisories, analysis.
- http://www.securitytracker.com/id/1041094cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8226cnnvd
- https://www.securityfocus.com/bid/104361cnnvd
- http://www.securityfocus.com/bid/104361enisa_euvd
- http://www.securitytracker.com/id/1041094enisa_euvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8226enisa_euvd
- http://www.securityfocus.com/bid/104361Third Party AdvisoryVDB Entrynvd
- http://www.securitytracker.com/id/1041094Third Party AdvisoryVDB Entrynvd
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