CVE-2021-34536
High
Published: 12 August 2021
Published
12 August 2021
Modified
16 December 2025
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
0.0042
62.5th percentile
Risk Priority
16
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-34536 is a high-severity Integer Overflow or Wraparound (CWE-190) vulnerability in Microsoft Windows 10. Its CVSS base score is 7.8 (High).
Operationally, ranked in the top 37.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-21189
Vulnerability details
Storage Spaces Controller 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
1607, 1809, 1909, 2004, 20h2
microsoft
windows server 2016
2004, 20h2, all versions
microsoft
windows server 2019
all versions
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.