CVE-2017-0263

KEVMicrosoft Win32k Privilege Escalation Vulnerability

Description

Microsoft Win32k contains a privilege escalation vulnerability due to the Windows kernel-mode driver failing to properly handle objects in memory.

The kernel-mode drivers in Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016 allow local users to gain privileges via a crafted application, aka "Win32k Elevation of Privilege Vulnerability."

CVSS 3.1 vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

PublishedMay 12, 2017

Last modifiedJun 17, 2026

Added to KEVFeb 10, 2022

Remediation dueAug 10, 2022

References

securityfocus.com/bid/98258Broken LinkThird Party Advisory
securitytracker.com/id/1038449Broken LinkThird Party Advisory
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0263PatchVendor Advisory
exploit-db.com/exploits/44478/ExploitThird Party Advisory
xiaodaozhi.com/exploit/117.htmlExploitThird Party Advisory
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-0263US Government Resource

0 recent articles mention this CVE

Risk assessment · High

Actively exploited. Patch immediately.

Exploitation: Confirmed in the wild (CISA KEV)
Federal remediation deadline: Overdue by 1539 days
CVSS: 7.8 HIGH
EPSS (30-day exploit probability): 10.0% · top 4% of all CVEs
Weakness: CWE-416

Recommended actions

1.Apply updates per vendor instructions.
2.Treat as emergency change: patch or isolate internet-facing instances first.
3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.

Assessment is derived automatically from the live signals above; verify against your own asset inventory.