CVE-2013-3660
Microsoft Win32k Privilege Escalation Vulnerability
Published May 24, 2013 · updated Jun 16, 2026 · microsoft windows 7
The EPATHOBJ::pprFlattenRec function in 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, and Windows Server 2012 does not properly initialize a pointer for the next object in a certain list, which allows local users to obtain write access to the PATHRECORD chain, and consequently gain privileges, by triggering excessive consumption of paged memory and then making many FlattenPath function calls, aka "Win32k Read AV Vulnerability."
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
May 24, 2013 · Catalog
Detected
The EPATHOBJ::pprFlattenRec function in 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, and Windows Server 2012 does not properly initialize a pointer for the next object in a certain list, which allows local users to obtain write access to the PATHRECORD chain, and
Mar 28, 2022 · CISA KEV
Known exploited
Apply updates per vendor instructions.
Apr 18, 2022 · CISA KEV
Remediation due
Apply updates per vendor instructions.
Jun 16, 2026 · Catalog
Updated
The EPATHOBJ::pprFlattenRec function in 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, and Windows Server 2012 does not properly initialize a pointer for the next object in a certain list, which allows local users to obtain write access to the PATHRECORD chain, and
Required action
Apply updates per vendor instructions.
CISA due date Apr 18, 2022
Affected
- cpe microsoft/windows 7version unspecified
- cpe microsoft/windows 8version unspecified
- cpe microsoft/windows rtversion unspecified
- cpe microsoft/windows server 2003version unspecified
- cpe microsoft/windows server 2008version unspecified
- cpe microsoft/windows server 2008r2
- cpe microsoft/windows server 2012version unspecified
- cpe microsoft/windows vistaversion unspecified
- vendor Microsoft Win32kversion unspecified
Sources
- CISA KEVConfirmed exploitationCVE-2013-3660
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.
cisa.gov - CVE.orgVulnerability recordCVE-2013-3660
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2013-3660
30-day exploitation probability 39.3%
first.org - Exploit DatabasePublic exploit reference25611
Public archive entry. The exploit body is not stored here.
exploit-db.com - Exploit DatabasePublic exploit reference25912
Public archive entry. The exploit body is not stored here.
exploit-db.com - Exploit DatabasePublic exploit reference26554
Public archive entry. The exploit body is not stored here.
exploit-db.com - Metasploit ModulesPublic exploit moduleexploit_windows/local/ppr_flatten_rec
Public module reference (average). Module source is not copied into this catalog.
rapid7.com - NIST NVDVulnerability recordCVE-2013-3660
The EPATHOBJ::pprFlattenRec function in 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, and Windows Server 2012 does not properly initialize a poin
nvd.nist.gov