CVE-2013-2553
Unspecified vulnerability in the kernel in Microsoft Windows 7 allows local users to gain privileges via unknown vectors, as demonstrated by Nils and Jon of MWR Labs during a Pwn2Own competition at CanSecWest 2013, a different vulnerability than CVE-2013-0912.
Date published : 2013-03-11
http://h30499.www3.hp.com/t5/HP-Security-Research-Blog/Pwn2Own-2013/ba-p/5981157
http://labs.mwrinfosecurity.com/blog/2013/03/06/pwn2own-at-cansecwest-2013/