Improper privilege management in Microsoft Edge (Chromium-based) allows an authorized attacker to bypass a security feature locally.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Microsoft
  • Edge Chromium

Configuration 1 [-]

cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*

No data.

References
Link Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21223 cve-icon cve-icon
History

Thu, 26 Feb 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

 ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Sun, 22 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
Description Microsoft Edge Elevation Service exposes a privileged COM interface that inadequately validates the privileges of the calling process. A standard (non‑administrator) local user can invoke the IElevatorEdge interface method LaunchUpdateCmdElevatedAndWait, causing the service to execute privileged update commands as LocalSystem. This allows a non‑administrator to enable or disable Windows Virtualization‑Based Security (VBS) by modifying protected system registry keys under HKLM\SYSTEM\CurrentControlSet\Control\DeviceGuard. Disabling VBS weakens critical platform protections such as Credential Guard, Hypervisor‑protected Code Integrity (HVCI), and the Secure Kernel, resulting in a security feature bypass. Improper privilege management in Microsoft Edge (Chromium-based) allows an authorized attacker to bypass a security feature locally.
Metrics cvssV3_1

{'score': 5.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

 cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C'}

Fri, 16 Jan 2026 22:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 16 Jan 2026 21:45:00 +0000

Type Values Removed Values Added
Description Microsoft Edge Elevation Service exposes a privileged COM interface that inadequately validates the privileges of the calling process. A standard (non‑administrator) local user can invoke the IElevatorEdge interface method LaunchUpdateCmdElevatedAndWait, causing the service to execute privileged update commands as LocalSystem. This allows a non‑administrator to enable or disable Windows Virtualization‑Based Security (VBS) by modifying protected system registry keys under HKLM\SYSTEM\CurrentControlSet\Control\DeviceGuard. Disabling VBS weakens critical platform protections such as Credential Guard, Hypervisor‑protected Code Integrity (HVCI), and the Secure Kernel, resulting in a security feature bypass.
Title Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
First Time appeared Microsoft
Microsoft edge Chromium
Weaknesses CWE-269
CPEs cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft edge Chromium
References
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published: 2026-01-16T21:28:30.158Z

Updated: 2026-02-26T14:44:46.346Z

Reserved: 2025-12-11T21:02:05.732Z

Link: CVE-2026-21223

cve-icon Vulnrichment

Updated: 2026-01-16T21:50:19.043Z

cve-icon NVD

Status : Modified

Published: 2026-01-16T22:16:25.983

Modified: 2026-02-22T17:16:54.310

Link: CVE-2026-21223

cve-icon Redhat

No data.