{"id":"CVE-2013-3660","aliases":["EUVD-2013-3593","GHSA-f2wh-c6mm-3vrx"],"status":"published","title":"The EPATHOBJ::pprFlattenRec function in win32k.sys in the kernel-mode drivers in Microsoft...","description":"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.\"","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.39318,"percentile":0.98615,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-119"],"published":"2013-05-24T20:00:00Z","modified":"2026-06-16T23:55:35Z","kev":{"date_added":"2022-03-28","due_date":"2022-04-18","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2022-03-28"},{"source":"kev","since":"2022-03-28"}],"exploits":[{"source":"metasploit","id":"exploit/windows/local/ppr_flatten_rec","title":"Windows EPATHOBJ::pprFlattenRec Local Privilege 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(Metasploit)","type":"local","platform":"windows","date":"2013-07-02","verified":true,"url":"https://www.exploit-db.com/exploits/26554"},{"source":"pocgithub","id":"ExploitCN/CVE-2013-3660-x64-WIN7","title":"ExploitCN/CVE-2013-3660-x64-WIN7","date":"2022-01-29","url":"https://github.com/ExploitCN/CVE-2013-3660-x64-WIN7"}],"products":[{"vendor":"microsoft","product":"win32k"},{"vendor":"microsoft","product":"windows_7"},{"vendor":"microsoft","product":"windows_8"},{"vendor":"microsoft","product":"windows_rt"},{"vendor":"microsoft","product":"windows_server_2003"},{"vendor":"microsoft","product":"windows_server_2008"},{"vendor":"microsoft","product":"windows_server_2012"},{"vendor":"microsoft","product":"windows_vista"},{"vendor":"microsoft","product":"windows_xp"}],"references":[{"url":"http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0094.html","tags":["mailing-list","x_refsource_FULLDISC","x_transferred","Broken Link"]},{"url":"http://www.exploit-db.com/exploits/25611/","tags":["exploit","x_refsource_EXPLOIT-DB","x_transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0090.html","tags":["mailing-list","x_refsource_FULLDISC","x_transferred","Broken Link"]},{"url":"http://secunia.com/advisories/53435","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Broken Link","Vendor Advisory"]},{"url":"http://www.osvdb.org/93539","tags":["vdb-entry","x_refsource_OSVDB","x_transferred","Broken Link"]},{"url":"http://twitter.com/taviso/statuses/309157606247768064","tags":["x_refsource_MISC","x_transferred","Exploit"]},{"url":"http://www.computerworld.com/s/article/9239477","tags":["x_refsource_MISC","x_transferred","Broken Link"]},{"url":"http://www.theverge.com/2013/5/23/4358400/google-engineer-bashes-microsoft-discloses-windows-flaw","tags":["x_refsource_MISC","x_transferred","Press/Media Coverage"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17360","tags":["vdb-entry","signature","x_refsource_OVAL","x_transferred","Broken Link"]},{"url":"http://www.reddit.com/r/netsec/comments/1eqh66/0day_windows_kernel_epathobj_vulnerability/","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking"]},{"url":"http://archives.neohapsis.com/archives/fulldisclosure/2013-06/0006.html","tags":["mailing-list","x_refsource_FULLDISC","x_transferred","Broken Link"]},{"url":"http://www.us-cert.gov/ncas/alerts/TA13-190A","tags":["third-party-advisory","x_refsource_CERT","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-053","tags":["vendor-advisory","x_refsource_MS","x_transferred","Patch","Vendor Advisory"]},{"url":"http://twitter.com/taviso/statuses/335557286657400832","tags":["x_refsource_MISC","x_transferred","Not Applicable"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2013-3660","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2013-3660"},{"url":"http://www.exploit-db.com/exploits/25611"},{"url":"http://www.reddit.com/r/netsec/comments/1eqh66/0day_windows_kernel_epathobj_vulnerability"},{"url":"https://github.com/advisories/GHSA-f2wh-c6mm-3vrx"}],"sources":{"cve":[{"id":"CVE-2013-3660","description":"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 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Vulnerability.\"","status":"published","published":"2013-05-24T20:00:00Z","modified":"2025-10-22T00:05:42Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"exploited_since":"2022-03-28","updated_at":"2026-11-02T19:49:39.244432Z"}],"ghsa":[{"id":"GHSA-f2wh-c6mm-3vrx","title":"The EPATHOBJ::pprFlattenRec function in win32k.sys in the kernel-mode drivers in Microsoft...","description":"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.\"","status":"published","published":"2022-05-14T01:31:28Z","modified":"2025-10-22T03:31:05Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T15:04:09.843024Z"}],"kev":[{"id":"CVE-2013-3660","title":"Microsoft Win32k Privilege Escalation Vulnerability","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.","cwes":["CWE-119"],"kev":{"date_added":"2022-03-28","due_date":"2022-04-18","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:16.541131Z"}],"nvd":[{"id":"CVE-2013-3660","description":"The EPATHOBJ::pprFlattenRec function in win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, 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