CVE-2019-0797VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2019-0797: Microsoft Win32k Privilege Escalation Vulnerability

Affects Microsoft Win32kSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 11/03/2021
KEV deadline: 05/03/2022
EPSS: 1.9% chance of exploitation in 30 days – higher than 79% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2019-0797 (opens in a new tab)

Description

CVE-2019-0797 is a privilege escalation vulnerability in the Microsoft Win32k component. The flaw arises from improper handling of objects in memory, allowing attackers to execute code in kernel mode. This vulnerability has been exploited in the wild. It affects the Win32k component but no specific affected versions are stated. The severity is high due to the potential for kernel-level code execution.

Summary

Microsoft Win32k contains a privilege escalation vulnerability (CVE-2019-0797) caused by improper handling of objects in memory. Successful exploitation enables an attacker to execute arbitrary code in kernel mode, elevating privileges. This vulnerability has been observed being exploited in the wild. No specific affected versions or patch information is provided in the input data.

Impact

An attacker who successfully exploits this vulnerability can execute code in kernel mode, potentially gaining full control over the affected system. This can lead to complete system compromise, bypassing security restrictions. The vulnerability has been exploited in the wild, indicating active threat.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor Microsoft advisories for updates and apply any available security updates promptly.

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:11:51 UTC

References

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