CVE-2026-70075: Windows Virtualization-Based Security (VBS) Enclave Security Feature Bypass Vulnerability
Published Oct 13, 2026
·Updated
Time-of-check time-of-use (toctou) race condition in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to bypass a security feature locally.
Other sources
Windows Virtualization-Based Security (VBS) Enclave Security Feature Bypass Vulnerability
— Microsoft
Affected Software
46 affected componentsFixes available
Microsoft Windows Virtualization-Based Security (VBS)
Microsoft Windows Server 2025<10.0.26100.33650
10.0.26100.33650
Microsoft Windows Server 2025<10.0.26100.33650
10.0.26100.33650
Microsoft Windows Server 2022<10.0.20348.5761
10.0.20348.5761
Microsoft Windows Server 2022<10.0.20348.5761
10.0.20348.5761
Microsoft Windows Server 2019<10.0.17763.9376
10.0.17763.9376
Microsoft Windows Server 2019<10.0.17763.9376
10.0.17763.9376
Microsoft Windows 10 1809<10.0.17763.9376
Microsoft Windows 10 1809<10.0.17763.9376
Microsoft Windows 10 21h2<10.0.19044.7807
Microsoft Windows 10 21h2<10.0.19044.7807
Microsoft Windows 10 21h2<10.0.19044.7807
Microsoft Windows 10 22h2<10.0.19045.7807
Microsoft Windows 10 22h2<10.0.19045.7807
Microsoft Windows 10 22h2<10.0.19045.7807
Microsoft Windows 11 23h2<10.0.22631.7652
Microsoft Windows 11 23h2<10.0.22631.7652
Microsoft Windows 11 24h2<10.0.26100.9711
Microsoft Windows 11 24h2<10.0.26100.9711
Microsoft Windows 11 25h2<10.0.26200.9711
Microsoft Windows 11 25h2<10.0.26200.9711
Microsoft Windows 11 26h1<10.0.28000.3231
Microsoft Windows 11 26h1<10.0.28000.3231
Microsoft Windows 11 26h2<10.0.26300.9711
Microsoft Windows 11 26h2<10.0.26300.9711
Microsoft Windows Server 2019<10.0.17763.9376
Microsoft Windows Server 2022<10.0.20348.5761
Microsoft Windows Server 2025<10.0.26100.33650
Microsoft Windows 10=1809, >=10.0.17763<10.0.17763.9376
10.0.17763.9376
Microsoft Windows 11=26H2, >=10.0.26300<10.0.26300.9711
10.0.26300.9711
Microsoft Windows 11=26H1, >=10.0.28000<10.0.28000.3231
10.0.28000.3231
Microsoft Windows 11=26H2, >=10.0.26300<10.0.26300.9711
10.0.26300.9711
Microsoft Windows 11=26H1, >=10.0.28000<10.0.28000.3231
10.0.28000.3231
Microsoft Windows 11=24H2, >=10.0.26100<10.0.26100.9711
10.0.26100.9711
Microsoft Windows 11=24H2, >=10.0.26100<10.0.26100.9711
10.0.26100.9711
Microsoft Windows 11=25H2, >=10.0.26200<10.0.26200.9711
10.0.26200.9711
Microsoft Windows 11=23H2, >=10.0.22631<10.0.22631.7652
10.0.22631.7652
Microsoft Windows 11=23H2, >=10.0.22631<10.0.22631.7652
10.0.22631.7652
Microsoft Windows 11=25H2, >=10.0.26200<10.0.26200.9711
10.0.26200.9711
Microsoft Windows 10=22H2, >=10.0.19045<10.0.19045.7807
10.0.19045.7807
Microsoft Windows 10=22H2, >=10.0.19045<10.0.19045.7807
10.0.19045.7807
Microsoft Windows 10=22H2, >=10.0.19045<10.0.19045.7807
10.0.19045.7807
Microsoft Windows 10=21H2, >=10.0.19044<10.0.19044.7807
10.0.19044.7807
Microsoft Windows 10=21H2, >=10.0.19044<10.0.19044.7807
10.0.19044.7807
Microsoft Windows 10=21H2, >=10.0.19044<10.0.19044.7807
10.0.19044.7807
Microsoft Windows 10=1809, >=10.0.17763<10.0.17763.9376
10.0.17763.9376
Remediation
Event History
Oct 13, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·07:00 PM
Data Sourced
via MITRE·07:00 PM
DescriptionSeverity
Data Sourced
via NVD·07:19 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What level of access does an attacker need to exploit this issue?
Exploitation requires local access and high privileges. No user interaction is required.
2
Which systems are identified as affected?
The affected software list includes Microsoft Windows 10, Windows 11, Windows Server 2019, Windows Server 2022, Windows Server 2025, and Microsoft Virtualization-Based Security (VBS).
3
What is the expected security impact?
The vulnerability allows a local, authorized attacker to bypass a security feature. The supplied vector indicates high integrity impact, with no confidentiality or availability impact.