Earlier this month, The New York Times published accounts of O'Reilly's settlements with five other women, including former Fox news anchor Gretchen Carlson, who said they were victims of his sexual harassment or other inappropriate behavior.
Wendy Walsh, who is represented by Bloom, had a guest appearance on The O'Reilly Factor.
"I'm told that they are taking it seriously, and they are going to do the investigation that's legally required of them", Bloom said on "Reliable Sources".
"This is not blowing over".
Paul Weiss is the same firm that conducted the investigation into former Fox News CEO Roger Ailes.
A representative for 21 Century Fox confirmed that the company is having the incident investigated by the law firm that fielded harassment complaints at Fox News previous year following the lawsuit filed by former anchor Gretchen Carlson.
Iraqi forces recapture new neighborhood from IS militants
Drones are being used to locate and direct air strikes on the militants who are dug in the middle of civilians, he said. After retaking east Mosul , Iraqi forces set their sights on the far side of the Tigris River, which divides the city.
Last Wednesday, Bloom and Walsh filmed themselves while calling Fox's corporate hotline to file a complaint, they later posted it on YouTube.
Bloom said O'Reilly had told Walsh he would recommend her for a paid contributor role on the network.
Last week, President Trump came to O'Reilly's defense, saying he thought of the Fox News personality as a "good friend" and claiming O'Reilly "didn't do anything wrong".
Meanwhile, about 60 companies have pulled advertising from "The O'Reilly Factor" in the wake of the report.
While defending Donald Trump on the air, Fox News has been privately using the Trump Access Hollywood tape to train their own employees about sexual harassment. Here's a breakdown of scandals surrounding the cable news network. "Apparently, several women have come forward and accused me of offering them exciting opportunities here at Fox News".