Viacom Chief Executive Philippe Dauman stepped up his attack on Shari Redstone on Monday, saying she has “abruptly taken hold of her father’s life” as part of a larger, “meritless” grab for control of the media giant.

Sumner Redstone on May 20 tossed the CEO and George Abrams, a second Viacom board member, from the family trust that will run Viacom upon his death or incapacitation — but Dauman claims in court papers filed Monday the move is “null and void” because Sumner didn’t have the ability to make such a move.

Dauman claims Shari and others have “repeatedly denied access” to the 93-year-old media mogul, in large part to keep them from learning about his impaired mental state.

The CEO hopes to convince a Massachusetts judge at a June 7 hearing to allow a quick examination of the Viacom founder to determine his mental state.

Shari Redstone, her dad’s health care proxy, and others on the Sumner Redstone National Amusements Trust are against any expedited examination.

“The longer the delay in gathering evidence the more likely [Shari and the other trustees] will argue that the evidence is no longer fully probative to determine Mr. Redstone’s capacity as of May 20,” Dauman’s lawyers wrote in a 15-page court filing on Monday.

Plus, the lawyers argue, Sumner Redstone could die before a delayed examination could be undertaken.

“There is a great risk that Mr. Redstone will not be available for a delayed medical examination, deposition or trial testimony,” Dauman’s legal eagles told the judge in the filing.

“[Redstone] is 93 years old, frail, and has serious ailments,” the filing claims. “He is vulnerable to any number of medical setbacks and worse.”

The filing claims Redstone has been hospitalized “within the last few weeks” and is unable to “speak, stand, walk, eat, write or read.”

On June 3, members of the family trust filed papers seeking to render the issue of Sumner Redstone’s mental state moot. The trustees filed papers showing four members, a majority, ratified the changes to the trust, ousting Dauman and Abrams — both longtime Sumner Redstone confidantes.

But Dauman claims the ratification is “null and void” because it went against Massachusetts law and the bylaws of the trust.

The decision by the judge in the Norfolk, Mass., probate court could be key to Dauman’s standing within Viacom, parent of Nickelodeon, MTV, Comedy Central and Paramount Pictures.

If Dauman is unsuccessful in overturning his ouster, Shari would gain control of the trust once it takes over control of Sumner Redstone’s $40 billion media empire, which includes CBS.

Shari is an outspoken critic of Dauman.

Viacom shares, reflecting much shareholder unhappiness with Dauman’s management, have risen nine of the 10 trading days since his ouster from the family trust — signaling shareholders might see a change in the C-Suite coming.

Viacom shares on Monday morning were trading down 22 cents, at $44.78.