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CVE-2023-28235: Windows Lock Screen Security Feature Bypass Vulnerability

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-04-11 · updated 2026-06-17

Description

Windows Lock Screen Security Feature Bypass Vulnerability

Affected products

• Microsoft Windows 10: before 10.0.17763.4252 — fixed in 10.0.17763.4252
• Microsoft Windows 10 20H2: before 10.0.19042.2846 — fixed in 10.0.19042.2846
• Microsoft Windows 10: before 10.0.19044.2846 — fixed in 10.0.19044.2846
• Microsoft Windows 10: before 10.0.19045.2846 — fixed in 10.0.19045.2846
• Microsoft Windows Server 2019: all versions
• Microsoft Windows 10: from 10.0.17763.0 before 10.0.17763.4252 — fixed in 10.0.17763.4252
• Microsoft Windows 10 20H2: from 10.0.0 before 10.0.19042.2846 — fixed in 10.0.19042.2846
• Microsoft Windows 10: from 10.0.19043.0 before 10.0.19044.2846 — fixed in 10.0.19044.2846
• Microsoft Windows 10: from 10.0.19045.0 before 10.0.19045.2846 — fixed in 10.0.19045.2846
• Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.4252 — fixed in 10.0.17763.4252

How to fix

Upgrade to a fixed version: Microsoft Windows 10 10.0.17763.4252; Microsoft Windows 10 20H2 10.0.19042.2846; Microsoft Windows 10 10.0.19044.2846; Microsoft Windows 10 10.0.19045.2846; Microsoft Windows 10 10.0.17763.4252; Microsoft Windows 10 20H2 10.0.19042.2846; Microsoft Windows 10 10.0.19044.2846; Microsoft Windows 10 10.0.19045.2846; Microsoft Windows Server 2019 10.0.17763.4252. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-28235
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-28235

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