CVE-2013-0078
The Microsoft Antimalware Client in Windows Defender on Windows 8 and Windows RT uses an incorrect pathname for MsMpEng.exe, which allows local users to gain privileges via a crafted application, aka "Microsoft Antimalware Improper Pathname Vulnerability."
Date published : 2013-04-09
http://www.us-cert.gov/ncas/alerts/TA13-100A
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-034