CVE-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 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."
Key facts
- CVSS score
- 7.8 (v3.1)
- Severity
- HIGH
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Weakness (CWE)
- CWE-119
- EPSS score
- 39.3% (99th percentile)
- In CISA KEV
- Yes, added March 28, 2022
- In EU EUVD
- Yes (EUVD-2013-3593)
- Published
- May 24, 2013
- NVD last modified
- June 16, 2026
- Status
- Analyzed
CISA Known Exploited Vulnerability
Microsoft Win32k Privilege Escalation Vulnerability
Added to the KEV catalog on March 28, 2022; federal remediation due April 18, 2022.
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2013-3593 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 22, 2025.
View on the EU Vulnerability DatabaseAffected products
- microsoft / windows 7
- microsoft / windows 8
- microsoft / windows rt
- microsoft / windows server 2003
- microsoft / windows server 2008
- microsoft / windows server 2008
- microsoft / windows server 2012
- microsoft / windows vista
- microsoft / windows xp
- microsoft / windows xp
Certified products that may be affected
19 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Microsoft Windows 8 and Windows RT - Microsoft Corporation - Common Criteria CCEVS-VR-VID-10620-2015 - archived
- Windows 7 BitLocker™ Drive Encryption - Microsoft Corporation - FIPS 140 1332 - historical
- Microsoft Windows 7 Kernel Mode Cryptographic Primitives Library (cng.sys) - Microsoft Corporation - FIPS 140 1328 - historical
- Microsoft Windows Vista Kernel Mode Security Support Provider Interface (ksecdd.sys) - Microsoft Corporation - FIPS 140 1000 - historical
- Microsoft Windows Vista Cryptographic Primitives Library (bcrypt.dll) - Microsoft Corporation - FIPS 140 1001 - historical
See all 19 in the Security Certifications Explorer.
References
- http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0090.html(Broken Link)
- http://archives.neohapsis.com/archives/fulldisclosure/2013-05/0094.html(Broken Link)
- http://archives.neohapsis.com/archives/fulldisclosure/2013-06/0006.html(Broken Link)
- http://secunia.com/advisories/53435(Broken Link, Vendor Advisory)
- http://twitter.com/taviso/statuses/309157606247768064(Exploit)
- http://twitter.com/taviso/statuses/335557286657400832(Not Applicable)
- http://www.computerworld.com/s/article/9239477(Broken Link)
- http://www.exploit-db.com/exploits/25611/(Exploit, Third Party Advisory, VDB Entry)
- http://www.osvdb.org/93539(Broken Link)
- http://www.reddit.com/r/netsec/comments/1eqh66/0day_windows_kernel_epathobj_vulnerability/(Exploit, Issue Tracking)
- http://www.theverge.com/2013/5/23/4358400/google-engineer-bashes-microsoft-discloses-windows-flaw(Press/Media Coverage)
- http://www.us-cert.gov/ncas/alerts/TA13-190A(Third Party Advisory, US Government Resource)
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-053(Patch, Vendor Advisory)
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17360(Broken Link)
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2013-3660(US Government Resource)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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