CVE DATABASE / CVE-2019-0543

CVE-2019-0543

Microsoft Windows Privilege Escalation Vulnerability

CVSS 7.8 · HIGH ⚠ CISA KEV — ACTIVELY EXPLOITED RANSOMWARE

On the CISA KEV catalog

Confirmed exploited in the wild. Added 2022-03-15. Federal remediation due 2022-04-05.
Required action: Apply updates per vendor instructions.

Summary

An elevation of privilege vulnerability exists when Windows improperly handles authentication requests, aka "Microsoft Windows Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

CVSS 3.1 breakdown

Base score	7.8 (HIGH)
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector	LOCAL
Attack complexity	LOW
Privileges required	LOW
User interaction	NONE
Scope	UNCHANGED
Confidentiality	HIGH
Integrity	HIGH
Availability	HIGH

Weakness type (CWE)

CWE-287

Affected products

Microsoft windows 10 1507Microsoft windows 10 1607Microsoft windows 10 1703Microsoft windows 10 1709Microsoft windows 10 1803Microsoft windows 10 1809Microsoft windows 7Microsoft windows 8.1Microsoft windows rt 8.1Microsoft windows server 1709Microsoft windows server 1803Microsoft windows server 2008Microsoft windows server 2012Microsoft windows server 2016Microsoft windows server 2019

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References

Data: NIST NVD + CISA KEV. NVD last modified 2026-01-14. Always verify against the vendor advisory before acting.