CVE-2026-83500: Windows BitLocker Security Feature Bypass Vulnerability
Url redirection to untrusted site ('open redirect') in Windows BitLocker allows an unauthorized attacker to bypass a security feature with a physical attack.
Other sources
Windows BitLocker Security Feature Bypass Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
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Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
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Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
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Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
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Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648
Event History
Frequently Asked Questions
Does exploitation require credentials, user interaction, or network access?
No privileges or user interaction are required, but the attack requires physical access. The attack vector is physical rather than network-based.
Which Microsoft products are identified as affected?
The affected software list includes Microsoft Windows 10, Windows 11, Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2025, and Microsoft Windows BitLocker.
What security impact is indicated?
The vulnerability is rated medium severity with a 6.1 score. Its vector indicates high confidentiality and integrity impact, with no availability impact.