Unspecified vulnerability in Oracle Java SE 5.0u55, 6u65, and 7u45, and Java SE Embedded 7u45, allows remote attackers to affect confidentiality via unknown vectors related to Networking. NOTE: the previous information is from the January 2014 CPU. Oracle has not commented on third-party claims that the issue is related to incorrect permission checks when listening on a socket, which allows attackers to escape the sandbox.
"Applies to client deployment of Java only. This vulnerability can be exploited only through sandboxed Java Web Start applications and sandboxed Java applets."