CVE-2021-43247
High
Published: 15 December 2021
Published
15 December 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.0070
72.5th percentile
Risk Priority
16
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-43247 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Microsoft Windows 10. Its CVSS base score is 7.8 (High).
Operationally, ranked in the top 27.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-30191
Vulnerability details
Windows TCP/IP Driver Elevation of Privilege Vulnerability
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
microsoft
windows 10
1809, 1909, 2004, 20h2, 21h1
microsoft
windows 11
all versions
microsoft
windows server
2022, 20h2
microsoft
windows server 2016
2004
microsoft
windows server 2019
all versions
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
addresses: CWE-787
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.