It’s war between newscaster Paula Zahn and estranged hubby Richard Cohen.

Zahn is now suing him for $25 million, claiming he mismanaged her money.

And now it’s getting even uglier as reports surface claiming Zahn kept a love diary, detailing her secret affair!

Cohen reportedly found the diary, which details her relationship with new beau Paul Fribourg, and he is refusing to hand it back.

Zahn and Cohen were married for 20 years before their nasty split. They have three children.