CVE-2019-0808VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2019-0808: 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: 53.0% chance of exploitation in 30 days – higher than 98% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2019-0808 (opens in a new tab)

Description

CVE-2019-0808 is a privilege escalation vulnerability in the Microsoft Win32k component caused by improper handling of objects in memory. Exploitation allows an attacker to execute code in kernel mode, potentially gaining elevated privileges. This vulnerability has been exploited in the wild.

Summary

Microsoft Win32k contains a privilege escalation vulnerability (CVE-2019-0808) due to improper handling of objects in memory. Successful exploitation enables an attacker to run arbitrary code in kernel mode, elevating privileges on the affected system. This vulnerability has been observed in active exploitation scenarios.

Impact

An attacker who successfully exploits this vulnerability can execute code with kernel-level privileges, potentially leading to full system compromise or bypass of security controls. The vulnerability has been exploited in the wild, indicating active threat use.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:10:42 UTC

References

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