CVE-2017-0263VulnerabilityPublished 02/10/2022Updated 10/24/2026

CVE-2017-0263: Microsoft Win32k Privilege Escalation Vulnerability

Affects Microsoft Win32kSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 02/10/2022
KEV deadline: 08/10/2022
EPSS: 10.0% chance of exploitation in 30 days – higher than 95% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2017-0263 (opens in a new tab)

Description

CVE-2017-0263 is a privilege escalation vulnerability in the Microsoft Win32k component. It arises because the Windows kernel-mode driver improperly handles objects in memory. This flaw has been exploited in the wild, indicating active use by attackers. The vulnerability allows an attacker to gain elevated privileges on affected systems.

Summary

Microsoft Win32k contains a privilege escalation vulnerability due to improper handling of objects in memory by the Windows kernel-mode driver. This can allow an attacker to escalate privileges on a vulnerable system. The vulnerability is tracked as CVE-2017-0263 and has been observed in active exploitation scenarios.

Impact

Successful exploitation of this vulnerability enables attackers to elevate their privileges on affected Windows systems, potentially allowing unauthorized actions that require higher permissions.

Mitigation

No explicit patch or remediation information is provided in the input data. Patch status is not yet confirmed — check the Microsoft vendor advisory for current remediation guidance.

Weaknesses

CWE-416Use After Free (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 10:11:12 UTC

Weaknesses

References

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