From the New York Times article: "One senior government official, who had been briefed on an F.B.I. investigation into the matter, said that while there were attempts to penetrate the Republican committee’s systems, they were not successful."

From the WaPo: "U.S. officials said the Republican National Committee’s computer systems were also probed and possibly penetrated by hackers tied to Russian intelligence services, but that it remains unclear how much material — if any — was taken from the RNC."

There were a number of significant caveats in the NYT and WaPo reporting of this that people have ignored because it confirms their existing assumptions. Probably by design; it lets the papers push their preferred narratives whilst giving them something to fall back on if it turns out not to be true.