NBC's Ken Dilanian Curses Live on MSNBC, Apologizes

NBC's Ken Dilanian is the latest victim of the dreaded hot mic ... unwittingly unleashing a stream of curse words on live TV, but he's got an explanation and an apology.

Here's the deal ... Ken was supposed to be doing a live hit Tuesday on MSNBC about new developments in President Trump's refusal to concede and acknowledge President-Elect Joe Biden, and he cursed as Craig Melvin introduced him.

"Oh, s***, f***," Ken exclaimed while looking down at his phone. MSNBC quickly cut away after the profanity.

Ken's already saying sorry for his on-air gaffe ... he's apologizing for using profanity and says it was a byproduct of technical difficulties. He mistakenly hung up on the control room -- hence the four-letter words -- but didn't realize his mic was still hot.