CVE-2026-21223

{"id": "CVE-2026-21223", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.1, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 2.5}]}, "published": "2026-01-16T22:16:25.983", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21223", "source": "secure@microsoft.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Primary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-269"}]}], "descriptions": [{"lang": "en", "value": "Microsoft Edge Elevation Service exposes a privileged COM interface that inadequately validates the privileges of the calling process. A standard (non\u2011administrator) local user can invoke the IElevatorEdge interface method LaunchUpdateCmdElevatedAndWait, causing the service to execute privileged update commands as LocalSystem.\nThis allows a non\u2011administrator to enable or disable Windows Virtualization\u2011Based 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\u2011protected Code Integrity (HVCI), and the Secure Kernel, resulting in a security feature bypass."}], "lastModified": "2026-01-26T15:05:39.840", "sourceIdentifier": "secure@microsoft.com"}