How severe is CVE-2017-0263?

CVE-2017-0263 has a CVSS 3.1 base score of 7.8 (HIGH). EPSS estimates a 10.0% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2017-0263: Microsoft Win32k Privilege Escalation Vulnerability

CISA Known Exploited Vulnerabilities

Microsoft Win32k Privilege Escalation Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2022-02-10

Remediation due

2022-08-10

Required action
Apply updates per vendor instructions.

CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2017-0263

Description

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."

Severity

CVSS 3.1 · CISA7.8 HIGH

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

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impacttotal

Exploitation Context

as of October 17, 2026

All KEV statistics→

CISA added CVE-2017-0263 to the KEV catalog 1,735 days after its CVE record was published.
It is one of 391 Microsoft entries in the CISA KEV catalog, and one of 166 added in 2022.
Its current EPSS score (10.0%) is higher than that of 26% of CISA KEV entries.

Affected Products

Vendor	Product	Affected versions
Microsoft Corporation	Microsoft Corporation Microsoft Windows	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

References

5 Links

Exploits & PoCs

44478

Vulnerability databases

Other references

Record Details

Published

2017-05-12

Last updated

2025-10-21

Assigner (CNA)

microsoft

Credited to

More from Microsoft

All Microsoft CVEs→

CVE-2014-41137.8 HIGH

Microsoft Win32k Privilege Escalation Vulnerability

KEVEPSS 86.9%2014-10-15

CVE-2016-72557.8 HIGH

Microsoft Win32k Privilege Escalation Vulnerability

KEVEPSS 81.0%2016-11-10

CVE-2021-17327.8 HIGH

Windows Win32k Elevation of Privilege Vulnerability

MicrosoftKEVEPSS 78.4%2021-02-25

CVE-2019-14587.8 HIGH

Microsoft Win32k Privilege Escalation Vulnerability

MicrosoftKEVEPSS 74.4%2019-12-10

CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.