Vulnerabilities in the Sun Java Runtime Environment threaten the security of all platforms, browsers and mobile devices, reports ZDNet.
Said Chris Gatford, a security expert from penetration testing company Pure Hacking:
"This is as bad as it gets. It's a pretty significant weakness, which will have a considerable impact if the exploit codes come to fruition quickly. It could affect a lot of organizations and users."
Sun recently patched JRE 5 and the Java 6 developer version, reports Dark Reading, but is still testing a patch for consumer users' version 6, saying it should be out this week.