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CVE-2017-0263

Microsoft Win32k Privilege Escalation

7.8 HIGHActively exploited (CISA KEV)Public exploitEPSS 10.0%
  1. Published12 May 2017
  2. Added to CISA KEV10 Feb 2022
  3. Remediation due10 Aug 2022
Actively exploited (CISA KEV)

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

Added to KEV: 10 Feb 2022Federal remediation due: 10 Aug 2022

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."

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows 10 1507all versions
Microsoft Windows 10 1511all versions
Microsoft Windows 10 1607all versions
Microsoft Windows 10 1703all versions
Microsoft Windows 7all versions
Microsoft Windows 8.1all versions
Microsoft Windows Rt 8.1all versions
Microsoft Windows Server 2008r2
Microsoft Windows Server 2012r2
Microsoft Windows Server 2016all versions

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2017-0263 being actively exploited?

Yes. CVE-2017-0263 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 10 Feb 2022.

How severe is CVE-2017-0263?

CVE-2017-0263 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 10.0% probability of exploitation.

Which products are affected by CVE-2017-0263?

Affected products include Microsoft Windows 10 1507, Microsoft Windows 10 1511, Microsoft Windows 10 1607, Microsoft Windows 10 1703, Microsoft Windows 7, and 5 more.

How do I fix CVE-2017-0263?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2017-0263 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.