CVE-2020-17099 — Windows Lock Screen Security Feature Bypass Vulnerability

Executive Summary

None

Overview

6.8

CVSS MEDIUM

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Security Feature Bypass

Released Dec 8 2020

Last Updated Dec 8 2020

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.00962 — 0.56979 percentile

CVSS Vector

ATTACK VECTOR

Physical

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

None

SCOPE

Unchanged

Temporal Score: 5.9

EPSS Score

0.00962

probability of exploitation in the next 30 days

0.56979 percentile - updated 2026-06-20

View on FIRST.org

Affected Products

14 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 10 for 32-bit Systems	`4592464 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 for x64-based Systems	`4592464 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1607 for 32-bit Systems	`4593226 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1607 for x64-based Systems	`4593226 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1803 for 32-bit Systems	`4592446 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1803 for ARM64-based Systems	`4592446 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1803 for x64-based Systems	`4592446 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1809 for 32-bit Systems	`4592440 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1809 for ARM64-based Systems	`4592440 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1809 for x64-based Systems	`4592440 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2016	`4593226 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2016 (Server Core installation)	`4593226 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2019	`4592440 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2019 (Server Core installation)	`4592440 (Security Update)`	Important	Security Feature Bypass	Yes

Patches

4 patches

Article	Type	Restart
`4592464`	Security Update	Yes
`4593226`	Security Update	Yes
`4592446`	Security Update	Yes
`4592440`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Lockheed Martin Red Team

References

MSRC Advisory MITRE NVD