600k Yahoo - C.io_amy.txt Apr 2026
The "600k YAHOO - c.io_Amy.txt" file pertains to a July 2022 insider threat incident at Customer.io, where a senior engineer leaked roughly 600,000 user emails. Affected records primarily belonged to six clients, including OpenSea and Uphold, creating high risks for targeted phishing and credential theft among Yahoo users. For more details, visit Uphold's blog .
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