Danish Security company Secunia reported that more than 9 out of 10 Windows users are susceptible to the Flash zero-day vulnerability — that Adobe has reportedly known about since the end of 2008 — that won’t be patched by Adobe until later this week.
Secunia says that over 90% of Windows PCs run the vulnerable version of Flash and 48% of Windows PCs have buggy Adobe PDF Readers.
92% of the 900,000 users who recently ran Secunia’s Personal Software Inspector (PSI) utility have Flash Player 10 running on their PCs and 31% have Flash Player 9 — some users have both versions so the total exceeds 100% — according to Secunia.
Secunia’s PSI tool scans your computer to see what applications are installed and then checks to see if you have the most current version. If it finds a newer version of a program, it offers you a link to get it.