The Joomla Project is pleased to announce the immediate availability of Joomla 2.5.26. This is a security release for the 2.5 series of Joomla! and addresses two security issues.
The update process is very simple, and complete instructions are available here. Note that there are easier and better ways of updating than copying the files with FTP.
2.5 End of Life Update
As previously noted, the 2.5 series will reach end of life...