While “build 3266” exists as a historical artifact, searching for a direct download link is due to legal and security risks. The safe, legal, and fully functional version of CS 1.6 is available through Steam for a low cost, with active community support.
If you just want to play CS 1.6 without the headache of hunting for old links, the is still the most secure. While it’s a much higher build number, you can still play on most "Dual Protocol" servers that support both old and new versions. cs 16 build 3266 link