Summary
Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What kind of security feature could be bypassed by successfully exploiting this vulnerability?
An authenticated local attacker can disable or enable Windows VBS without administrative privileges, resulting in bypass of platform security hardening. This does not grant direct code execution as another user but weakens system security guarantees, enabling follow‑on attacks.
What is the version information for this release?
144.0.3719.82: 144.0.3719.82, 01/16/2026: 01/16/2026, 144.0.7559.60: 144.0.7559.60
According to the CVSS metrics, successful exploitation of this vulnerability could lead to major loss of confidentiality (C:H) and integrity (I:H). What does that mean for this vulnerability?
Virtualization-Based Security (VBS) safeguards credentials by isolating them within a secure environment. Disabling VBS reduces this isolation, compromising both confidentiality and integrity. It also weakens essential platform protections such as Credential Guard, Hypervisor-Protected Code Integrity (HVCI), and the Secure Kernel, resulting in a security feature bypass.
Security updates
144.0.3719.82 — https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security
Vulnerabilities 1
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High 7.1
Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
Improper privilege management in Microsoft Edge (Chromium-based) allows an authorized attacker to bypass a security feature locally.
Revision history
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#2
Updated information to include CVSS scores. This is an informational change only.
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#1
Information published.
References
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CVE-2026-21223 Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21223
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss