CVE-2013-3660Actively exploitedAdded to KEV 2022-03-28

Microsoft Win32k Privilege Escalation Vulnerability

Microsoft, Win32k

Description

The EPATHOBJ::pprFlattenRec function in win32k.sys in the kernel-mode drivers in Microsoft does not properly initialize a pointer for the next object in a certain list, which allows local users to gain privileges.

CVSS severity for this advisory hasn't been enriched from NVD yet, check back shortly.

EPSS, exploit probability

High

39.3%

estimated chance of real-world exploitation in the next 30 days, higher than 98.6% of every CVE FIRST.org scores

Refreshed 10/28/2026, via FIRST.org's EPSS model, not CVSS, this measures likelihood of exploitation, not how severe it would be.

Required action

Apply updates per vendor instructions.

CISA-recommended due date: 2022-04-18

CWE-119

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