CVE-2021-33771
Microsoft Windows 10 1507 ≤ 10.0.10240.19003
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSummary
CVE-2021-33771 is a high-severity an unspecified weakness vulnerability in Microsoft Windows 10 1507. Its CVSS base score is 7.8 (High).
Operationally, ranked in the top 5% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2021-33771 is a Windows Kernel Elevation of Privilege Vulnerability affecting the Windows kernel component. It carries a CVSS 3.1 base score of 7.8 with an attack vector of local access, low attack complexity, low privileges required, and no user interaction, resulting in high impact to confidentiality, integrity, and availability.
An attacker with local access and limited privileges can exploit the flaw to escalate privileges on the affected system, potentially obtaining full control over the Windows kernel and its resources.
Microsoft security advisories referenced at portal.msrc.microsoft.com provide guidance on available patches, while the CISA Known Exploited Vulnerabilities catalog entry confirms the issue has been observed in active exploitation.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-20448
Vulnerability Data
Windows Kernel Elevation of Privilege Vulnerability
- CWE(s)
- KEV Date Added
- 03 November 2021
Related Threats
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Affected Assets
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.