# CVE-2013-3660

## Summary

- **CVE ID:** CVE-2013-3660
- **Severity:** HIGH
- **CVSS Score:** 7.8 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** May 24, 2013
- **Last Modified:** Sep 16, 2026

## 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."

## Affected Products

- n/a — n/a (n/a)

## References

- [CNA](http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0094.html)
- [CNA](http://www.exploit-db.com/exploits/25611/)
- [CNA](http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0090.html)
- [CNA](http://secunia.com/advisories/53435)
- [CNA](http://www.osvdb.org/93539)
- [CNA](http://twitter.com/taviso/statuses/309157606247768064)
- [CNA](http://www.computerworld.com/s/article/9239477)
- [CNA](http://www.theverge.com/2013/5/23/4358400/google-engineer-bashes-microsoft-discloses-windows-flaw)
- [CNA](https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17360)
- [CNA](http://www.reddit.com/r/netsec/comments/1eqh66/0day_windows_kernel_epathobj_vulnerability/)
- [CNA](http://archives.neohapsis.com/archives/fulldisclosure/2013-06/0006.html)
- [CNA](http://www.us-cert.gov/ncas/alerts/TA13-190A)
- [CNA](https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-053)
- [CNA](http://twitter.com/taviso/statuses/335557286657400832)
- [CISA-ADP](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2013-3660)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 69.19%
- **EPSS Percentile:** 98.6

## Known Exploited Vulnerabilities (KEV)

- **Date Added:** Mar 28, 2022
- **Due Date:** Apr 18, 2022

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._