CVE-2021-43247
Windows TCP/IP Driver Elevation of Privilege Vulnerability
HIGH
7.8
CVSS Score
Published: December 15, 2021 at 02:15 PM UTC
Updated: June 17, 2026 at 04:10 AM UTC
15 products affected across 1 vendorWindows Server 2016Windows Server 2019Windows 10 1809
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Severity
HIGH7.8
Exploit prediction
EPSS 0.9%
Description
Windows TCP/IP Driver Elevation of Privilege Vulnerability
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Affected range stops below 10.0.17763.2366, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.18363.1977, so it looks safe — our inference, not a vendor statement
All versions
Affected range stops below 10.0.19041.1415, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.17763.2366, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.20348.405, so it looks safe — our inference, not a vendor statement
10.0.0 ≤ v < 10.0.19041.141510.0.0
Affected range stops below 10.0.19041.1415, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43247x_refsource_MISCThird Party AdvisoryVDB Entry
Source: [email protected]
https://www.zerodayinitiative.com/advisories/ZDI-21-1554/CVSS
7.8HIGHmicrosoft
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-787
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