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The Wall Street Journal: SEC says its Edgar filing system was hacked in 2016

WASHINGTON — The top U.S. markets regulator disclosed on Wednesday that hackers penetrated its electronic system for storing public-company filings and may have traded illegally on the information.

The Securities and Exchange Commission’s chairman, Jay Clayton, revealed the breach in an unusual and lengthy statement issued Wednesday evening. The SEC said it was investigating the source of the hack, which it said exploited a software vulnerability in a part of the Edgar system.

“We also face the risks of actors attempting to access nonpublic data relating to our oversight, or enforcement against, market participants, which could then be used to obtain illicit trading profits.

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