Buffer overflow in Resco Photo Viewer for PocketPC 4.11 and 6.01, as used in mobile devices running Windows Mobile 5.0, 2003, and 2003SE, allows remote attackers to execute arbitrary code via a crafted PNG image.
http://www.vupen.com/english/advisories/2007/0072
http://www.securityfocus.com/bid/21920
http://secunia.com/advisories/23658
http://blog.trendmicro.com/flaw-in-3rd-party-app-weakens-windows-mobile/