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Windows CVE-2019-0803

HIGH
2019-04-09 secure@microsoft.com
7.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
7.8 HIGH
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Lifecycle Timeline

5
Analysis Generated
Mar 26, 2026 - 11:18 vuln.today
Added to CISA KEV
Oct 29, 2025 - 14:44 cisa
CISA KEV
PoC Detected
Oct 29, 2025 - 14:44 vuln.today
Public exploit code
Patch released
Oct 29, 2025 - 14:44 nvd
Patch available
CVE Published
Apr 09, 2019 - 21:29 nvd
HIGH 7.8

DescriptionCVE.org

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-0685, CVE-2019-0859.

AnalysisAI

Windows Win32k fails to properly handle objects in memory, allowing local privilege escalation exploited in the wild in April 2019 as part of targeted APT exploit chains.

Technical ContextAI

The Win32k vulnerability involves improper management of window objects in kernel memory. A crafted application triggers a condition allowing kernel memory corruption and token manipulation for privilege escalation.

Affected ProductsAI

Multiple Windows versions affected

RemediationAI

Apply Microsoft security update. Deploy Win32k attack surface reduction through Exploit Guard. Monitor for kernel exploitation indicators.

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CVE-2019-0803 vulnerability details – vuln.today

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