An exploit for MS05-053, which described a vulnerability in Microsoft's graphics rendering engine when redering EMF and WMF files, has been released. The ISC has a write-up. The posted exploit only has a DoS payload, however the vulnerability allows for code execution. Trend Micro previously reported that a Trojan (TROJ_EMFSPLOIT.A) used the exploit, but later retracted their claim. Patches should be deployed by now, but for those lagging behind you should get a move on.