The new allegations against Rose date to 1976, when, according to a former research assistant, he exposed his penis and touched her breasts in the NBC News Washington bureau where they worked.

“This other personality would come through, and the groping would happen,” said the former research assistant, Joana Matthias, now 63. An NBC News spokeswoman declined to comment.

At CBS News, where in addition to the morning show Rose worked as a contributing correspondent for “60 Minutes,” some women who said they were harassed said they feared reporting the violations to executives, whom they viewed as prioritizing the careers of male stars.

“I had been there long enough to know that it was just the way things went,” said Sophie Gayter, now 27, who worked at “60 Minutes” in 2013 when, she said, Rose groped her buttocks as they walked down an office hallway to a recording studio. “People said what they wanted to you, people did what they wanted to you.”