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Fencer Vulns
medium 6.1

CVE-2021-42288 json

Windows Hello Security Feature Bypass Vulnerability

published 2021-11-10 4 y ago modified 2026-08-19 2 mo ago also EUVD-2021-29263

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

Windows Hello Security Feature Bypass Vulnerability

Patch / fix

  • Microsoft Windows 10 Version 1809 10.0.17763.2300
  • Microsoft Windows 10 Version 1909 10.0.18363.1916
  • Microsoft Windows 10 Version 2004 10.0.19041.1348
  • Microsoft Windows 10 Version 20H2 10.0.19042.1348
  • Microsoft Windows 10 Version 21H1 10.0.19043.1348
  • Microsoft Windows Server 2019 10.0.17763.2300
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.2300
  • Microsoft Windows Server version 2004 10.0.19041.1348
  • Microsoft Windows Server version 20H2 10.0.19041.1348

Exploit prediction

0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.7 CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C
CNA 3.1 5.7 CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CNA 3.1 6.1 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD 2.0 3.6 AV:L/AC:L/Au:N/C:P/I:P/A:N

Affected products

  • Microsoft Windows 10 Version 1809
  • Microsoft Windows 10 Version 1909
  • Microsoft Windows 10 Version 2004
  • Microsoft Windows 10 Version 20H2
  • Microsoft Windows 10 Version 21H1
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows Server version 2004
  • Microsoft Windows Server version 20H2

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.