Een nieuwe patch voor Call of Duty 4: Modern Warfare is beschikbaar. Voordat deze geïnstalleerd kan worden moet u wel beschikken over patch met nummer 1.4. De download link brengt u naar een site met verschillende mirrors. De changelog van de 1.5-update ziet er als volgt uit:
CHANGES:
• Fixed server browser not showing all of the servers
• The "hold [ ] to steady" sniper scope hint will only appear if you can use it
• Fixed game not recognizing IWDs existing if they are all in fs_basepath and none are in the main/ folder
• Made mod scripts able to change stats
• Allow developer_script for mulitiplayer modding
• Fixed map rotation errors with usermaps
• Fix for reloading several times after connecting to a modded server
• Fixed minimap not showing up in the menu for usermaps
• Fixed an issue with Http redirect downloads.
• Mod tools will now work with other languages
NOTE: patch 1.5 is not compatible with 1.4. You will not be able to find 1.4 servers if you update.

NOTE: Please ensure you have previously downloaded 1.4 patch before downloading 1.5 as you will need the 'Winter Crash' map from 1.4.