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01 Record

CVE-2021-34513

Windows Storage Spaces Controller Elevation of Privilege Vulnerability

HighPUBLISHEDCNA: microsoft
CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
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02 Description

Windows Storage Spaces Controller Elevation of Privilege Vulnerability

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
1.05% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 64.3% of scored records. A rank, not a probability.
NVD base score
7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-08-10.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-07-14 17:54Z5 YR AGO
Last updated
2026-08-10 15:11Z2 MO AGO
Reserved
2021-06-09
Assigning CNA
microsoft
Record state
PUBLISHED
Severity
High (CVSS 7.8)
CNA CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Weaknesses
  • CWE-190Integer Overflow or WraparoundBase
Data version
5.2
Document digest
83343700aa59c76fd1cfc371e38442ae31c172edfbe6ca14b9967454c7dca7c2

05 Affected products

VendorProductVersionsPlatforms
MicrosoftWindows 10 Version 190910.0.0 to < 10.0.18363.167932-bit Systems, ARM64-based Systems, x64-based Systems
MicrosoftWindows 10 Version 200410.0.0 to < 10.0.19041.111032-bit Systems, ARM64-based Systems, x64-based Systems
MicrosoftWindows 10 Version 20H210.0.0 to < 10.0.19042.111032-bit Systems, ARM64-based Systems
MicrosoftWindows 10 Version 21H110.0.0 to < 10.0.19043.111032-bit Systems, ARM64-based Systems, x64-based Systems
MicrosoftWindows Server version 200410.0.0 to < 10.0.19041.1110x64-based Systems
MicrosoftWindows Server version 20H210.0.0 to < 10.0.19042.1110x64-based Systems

06 References