# CVE-2013-3660: Microsoft Win32k Privilege Escalation Vulnerability

> CVE-2013-3660: Microsoft Win32k Privilege Escalation Vulnerability. CVSS 7.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2013-3660
Last updated: 2025-10-22T00:05:42Z

- Published: 2013-05-24 20:00 UTC · Updated: 2025-10-22 00:05 UTC · Assigner: mitre
- CVSS: 7.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 39.3%, 99th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-03-28, federal due date 2022-04-18, ransomware use: Unknown

## 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."

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Microsoft: Win32k

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2013-3660)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2013-3660)
- [http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0090.html](http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0090.html)
- [http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0094.html](http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0094.html)
- [http://archives.neohapsis.com/archives/fulldisclosure/2013-06/0006.html](http://archives.neohapsis.com/archives/fulldisclosure/2013-06/0006.html)
- [https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-053](https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-053)
- [http://secunia.com/advisories/53435](http://secunia.com/advisories/53435)
- [https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17360](https://oval.cisecurity.org/repository/search/definition/oval%253Aorg.mitre.oval%253Adef%253A17360)
- [http://twitter.com/taviso/statuses/309157606247768064](http://twitter.com/taviso/statuses/309157606247768064)
- [http://twitter.com/taviso/statuses/335557286657400832](http://twitter.com/taviso/statuses/335557286657400832)
- [http://www.computerworld.com/s/article/9239477](http://www.computerworld.com/s/article/9239477)
- [http://www.exploit-db.com/exploits/25611/](http://www.exploit-db.com/exploits/25611/)
- [http://www.osvdb.org/93539](http://www.osvdb.org/93539)
- [http://www.reddit.com/r/netsec/comments/1eqh66/0day\_windows\_kernel\_epathobj\_vulnerability/](http://www.reddit.com/r/netsec/comments/1eqh66/0day_windows_kernel_epathobj_vulnerability/)
- [http://www.theverge.com/2013/5/23/4358400/google-engineer-bashes-microsoft-discloses-windows-flaw](http://www.theverge.com/2013/5/23/4358400/google-engineer-bashes-microsoft-discloses-windows-flaw)
- [http://www.us-cert.gov/ncas/alerts/TA13-190A](http://www.us-cert.gov/ncas/alerts/TA13-190A)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2013-3660 · Markdown: https://rewindex.com/cve/CVE-2013-3660.md · JSON: https://rewindex.com/api/v1/cves/CVE-2013-3660 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:46:22.550Z