Oracle has released Java 7 Update 13. In their release notes, Oracle "strongly recommends that all Java SE 7 users upgrade to this release." Oracle has also released an update to Java 6, bringing it to Update 39.
As per the Oracle Java SE Critical Patch Update Advisory - February 2013, the original patch was scheduled to be released on February 19. Oracle accelerated the release due to "active exploitation in the wild".
We recommend that you keep your system's Java installation up to date by downloading and installing the latest Java version immediately. You may do this by verifying your Java version or by manually downloading it.