CVE-2013-3660

mediumpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.393 · 99 %ileexploit · functionalEUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 6 exploits · functional

Likely / severe?

39.3% (99th) EPSS

CVSS 6.9 · medium

Is it mine?

10 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

added 2022-03-28remediate by 2022-04-18

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-27

Microsoft Win32k Privilege Escalation Vulnerability

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."

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.8

v2.06.9mediumAV:L/AC:M/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.4 · impact 10

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondaryexploitability 1.8 · impact 5.9

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USprimary

exploits (6)

Public proof-of-concept and weaponised exploit code.

EDB-25611Microsoft Windows - Win32k!EPATHOBJ::pprFlattenRec Uninitialized Next Pointer Testcasefunctional · exploit_db
EDB-25912Microsoft Windows NT/2000/2003/2008/XP/Vista/7/8 - 'EPATHOBJ' Local Ringfunctional · exploit_db
EDB-26554Microsoft Windows - 'EPATHOBJ::pprFlattenRec' Local Privilege Escalation (Metasploit)functional · exploit_db
exploit/windows/local/ppr_flatten_recWindows EPATHOBJ::pprFlattenRec Local Privilege EscalationPoC · metasploit
ExploitCN/CVE-2013-3660-x64-WIN7CVE-2013-3660的x64 win7平台EXP源代码，成功率100%。PoC · poc_in_github
kikozz/CVE-2013-3660-win32k.syskikozz/CVE-2013-3660-win32k.sysPoC · poc_in_github

affected products (10)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
microsoft windows 7all versionsnvdUScpe:2.3:o:microsoft:windows_7:*:*:*:*:*:*:*:*
microsoft windows 8all versionsnvdUScpe:2.3:o:microsoft:windows_8:*:*:*:*:*:*:*:*
microsoft windows rtall versionsnvdUScpe:2.3:o:microsoft:windows_rt:*:*:*:*:*:*:*:*
microsoft windows server 2003all versionsnvdUScpe:2.3:o:microsoft:windows_server_2003:*:*:*:*:*:*:*:*
microsoft windows server 2008all versionsnvdUScpe:2.3:o:microsoft:windows_server_2008:*:*:*:*:*:*:*:*
microsoft windows server 2008= r2nvdUScpe:2.3:o:microsoft:windows_server_2008:*:*:*:*:*:*:*:*
microsoft windows server 2012all versionsnvdUScpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:*:*
microsoft windows vistaall versionsnvdUScpe:2.3:o:microsoft:windows_vista:*:*:*:*:*:*:*:*
microsoft windows xpall versionsnvdUScpe:2.3:o:microsoft:windows_xp:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2013-05-24modified 2026-06-16

related (21,028)

Related entries.

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+21023 more

references (39)

External citations — patches, advisories, analysis.

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