CVE-2013-3866

win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, and Windows RT allows local users to gain privileges via a crafted application, aka "Win32k Elevation of Privilege Vulnerability."

Published: 2013-09-11 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-3866 is rated Moderate Risk (56.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.81%). EPSS rose +1.14% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2013-3866

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.67% 1.81% +1.14%
2 2025-12-28 0.59% 0.67% +0.08%
3 2025-12-27 — 0.59% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-3866

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2013-3866

Affected software / configurations for CVE-2013-3866

Vendor Product Version Raw CPE
microsoft windows_2003_server — cpe:2.3:o:microsoft:windows_2003_server:*:sp2:*:*:*:*:*:*
microsoft windows_2003_server — cpe:2.3:o:microsoft:windows_2003_server:*:sp2:itanium:*:*:*:*:*
microsoft windows_2003_server — cpe:2.3:o:microsoft:windows_2003_server:*:sp2:x64:*:*:*:*:*
microsoft windows_7 — cpe:2.3:o:microsoft:windows_7:*:sp1:x64:*:*:*:*:*
microsoft windows_7 — cpe:2.3:o:microsoft:windows_7:*:sp1:x86:*:*:*:*:*
microsoft windows_8 — cpe:2.3:o:microsoft:windows_8:-:-:x64:*:*:*:*:*
microsoft windows_8 — cpe:2.3:o:microsoft:windows_8:-:-:x86:*:*:*:*:*
microsoft windows_rt — cpe:2.3:o:microsoft:windows_rt:-:*:*:*:*:*:*:*
microsoft windows_server_2008 — cpe:2.3:o:microsoft:windows_server_2008:*:r2:itanium:*:*:*:*:*
microsoft windows_server_2008 — cpe:2.3:o:microsoft:windows_server_2008:*:r2:x64:*:*:*:*:*
microsoft windows_server_2008 — cpe:2.3:o:microsoft:windows_server_2008:*:sp2:itanium:*:*:*:*:*
microsoft windows_server_2008 — cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x64:*:*:*:*:*
microsoft windows_server_2008 — cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x86:*:*:*:*:*
microsoft windows_server_2012 — cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
microsoft windows_vista — cpe:2.3:o:microsoft:windows_vista:*:sp2:*:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:-:sp2:x64:*:*:*:*:*

References for CVE-2013-3866

cvelogic Threat Intelligence