Oracle has just released Security
Alert CVE-2012-4681 to address 3 distinct but related vulnerabilities and
one security-in-depth issue affecting Java running in desktop browsers. These
vulnerabilities are: CVE-2012-4681, CVE-2012-1682, CVE-2012-3136, and
CVE-2012-0547.
These vulnerabilities are not applicable to standalone Java
desktop applications or Java running on servers, i.e. these vulnerabilities do
not affect any Oracle server based software."
(Read more at https://blogs.oracle.com/security/entry/security_alert_for_cve_20121)
Updates are available at http://www.oracle.com/technetwork/java/javase/overview/index.html
or Check your Java version online: http://www.java.com/de/download/testjava.jsp