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, Windo…

published 2017-05-12 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-0619

cvss: 7.8; version 3.1, CNA
cisa kev: Exploited; added 2022-02-10
epss: 10.0%; EPSS 10.0% chance of exploitation in 30 days, percentile 95%
public exploits: 1; Exploit-DB

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."

Patch / fix

cisa required action Apply updates per vendor instructions.

links 1

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0263 advisory

Timeline

2017-05-09 0-day patched (Project Zero)
2017-05-12 Published
2018-03-26 First public exploit (EDB-44478)
2022-02-10 Added to CISA KEV
2022-08-10 CISA patch deadline
2025-02-10 CISA SSVC: exploitation active

Known exploited

Added: 4 y ago (2022-02-10)
Patch by: 2022-08-10 (4 y ago)
Ransomware: Not known
Required action: Apply updates per vendor instructions.
Vendor, product: Microsoft, Win32k
CISA name: Microsoft Win32k Privilege Escalation Vulnerability

Zero-day

Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.

Patched: 2017-05-09
Details: project zero tracker

CISA SSVC

Exploitation: Active, exploited in the wild
Automatable: no
Technical impact: total
Assessed: 20 mo ago (2025-02-10)

Exploit prediction

10.03% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

EDB-44478 Microsoft Windows Manager (7 x86) - Menu Management Component UAF Privilege Elevation local, 2018-03-26
xiaodaozhi.com https://xiaodaozhi.com/exploit/117.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.2	AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

Microsoft Corporation Microsoft Windows

Classification

Weakness

CWE-416 Use After Free

References

portal.msrc.microsoft.com /en-US/security-guidance/advisory/CVE-2017-0263
patch, vendor-advisory
exploit-db.com /exploits/44478/
exploit, third-party-advisory, vdb-entry
xiaodaozhi.com /exploit/117.html
exploit, third-party-advisory
securitytracker.com /id/1038449
vdb-entry, broken-link, third-party-advisory
securityfocus.com /bid/98258
vdb-entry, broken-link, third-party-advisory
cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-0263
government-resource, us-government-resource

Sources

CVE List CVE-2017-0263
NVD CVE-2017-0263

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary