Secunia: RealPlayer SWF Frame Handling Buffer Overflow - UPDATE
Secunia Research has discovered a vulnerability in RealPlayer, which potentially can be exploited by malicious people to compromise a user's system.More here.
The vulnerability is caused due to a design error within the handling of frames in Shockwave Flash (SWF) files and can be exploited to cause a heap-based buffer overflow.
Successful exploitation may allow execution of arbitrary code.
UPDATE: 15:59: RealNetworks has releases a patch, so please do so. -ferg