WASHINGTON — President Trump dismissed a report about Chinese and Russian spies listening in on his cellphone calls as “soooo wrong,” yet he acknowledged the crucial vulnerability being exploited by foreign agents — that he uses a cellphone to make calls.

The article, published Wednesday in The New York Times, detailed how American intelligence agencies have figured out that China and Russia are eavesdropping on calls Mr. Trump makes from his iPhones, and that the president has continued to use a cellphone despite warnings from aides that calls on it are not secure.

In addition, China is now believed to be using what it is learning from the calls — how Mr. Trump thinks, what arguments tend to sway him and to whom he is inclined to listen — to try to influence Mr. Trump and avoid a further escalation of a trade war, according to multiple current and former American officials.

Mr. Trump jumped on the news early on Thursday, writing on Twitter that “so-called experts on Trump” at The Times had written a boring article that was so riddled with errors that “I do not have time here to correct it.”