An internal investigation into the breaches has held the executives responsible for failing to conduct a deep probe into the security lapses once revealed, alleging the executives “failed to act sufficiently.” The report also called out the legal department for failing to act immediately, which caused the breaches to not be “properly investigated and analyzed at the time.”

The data breaches, reported by Yahoo in 2016, compromised over 1 billion user accounts and cost the company $350 million after Verizon reduced its takeover deal price. Over 40 lawsuits have been filed against the company and the SEC and FTC are investigating the incidents.

In her defense, Mayer says she tried to set things right as soon as she was made aware of the breaches.