VYPR
High severity7.1NVD Advisory· Published Mar 11, 2021· Updated Aug 19, 2026

CVE-2021-26866

CVE-2021-26866

Description

Windows Update Service Elevation of Privilege Vulnerability

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

21
  • cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*+ 8 more
    • cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:*range: 10.0.0
    • cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:x86:*range: 10.0.0
  • cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*+ 4 more
    • cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*range: 10.0.0
  • cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
    • cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*range: 10.0.0
  • cpe:2.3:o:microsoft:windows_10_20H2:*:*:*:*:*:*:x86:*+ 1 more
    • cpe:2.3:o:microsoft:windows_10_20H2:*:*:*:*:*:*:x86:*range: 10.0.0
    • cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*range: 10.0.0
  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*+ 1 more
    • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*range: 10.0.0
    • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*range: 10.0.0

Patches

Vulnerability mechanics

References

3

News mentions

0

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