Oracle have released information about multiple critical Java vulnerabilities which affects JDK/JRE.
Affected product releases and versions
JDK and JRE 7 Update 21 and earlier
JDK and JRE 6 Update 45 and earlier
JDK and JRE 5.0 Update 45 and earlier
JavaFX 2.2.21 and earlier
Due to the threat posed by a successful attack, Oracle strongly recommends that customers apply CPU fixes as soon as possible. This Critical Patch Update contains 40 new security fixes across Java SE products of which 4 are applicable to server deployments of Java.