In a letter to Securities and Exchange Commission Chairwoman Mary Jo White, co-founder of the Senate Cybersecurity Caucus Sen. Mark Warner, D-Va., has called for an SEC investigation into whether Yahoo properly notified investors after its large-scale breach, SFGate reports. In his letter, Warner questions why Verizon took so long to inform customers and Verizon Communications, which is in the midst of an acquisition deal with Yahoo, of the breach after discovering it. “A breach of the magnitude that Yahoo and its users suffered seems to fit squarely within the definition of a material event,” Warner wrote. “The public ought to know what senior executives at Yahoo knew of the breach, and when they knew it.” Meanwhile, six additional senators wrote to Yahoo CEO Marissa Mayer, asking for answers on the breach, Reuters reports.
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