Home/CVE/Windows HTTP.sys Elevation of Privilege Vulnerability
CVE

CVE-2021-26442

Windows HTTP.sys Elevation of Privilege Vulnerability

Windows HTTP.sys Elevation of Privilege Vulnerability.

HIGH · CVSS 7 EPSS 0.00253
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
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Affected Products & Versions

10
microsoft windows 10all versions
microsoft windows 11all versions
microsoft windows 7all versions
microsoft windows 8.1all versions
microsoft windows rt 8.1all versions
microsoft windows server 2008all versions
microsoft windows server 2012all versions
microsoft windows server 2016all versions
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Scoring & Timeline

7
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 Oct 2021 · 01:15 AM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
msrcCVE-2021-26442Elevation of Privilege
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26442PatchVendor Advisory
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