The two-line letter to the CIA’s director is the latest warning in recent years from a long-serving Democratic senator with knowledge of secret government programs and intelligence operations.
Substack said that customer data was accessed in October 2025, but wasn’t discovered until early February.
Security researchers have attributed the attempted use of destructive “wiper” malware across Poland’s energy infrastructure in late December to a Russian-backed hacking group known for causing power outages in neighboring Ukraine.
TechCrunch obtained a sample of the stolen data, which contained names, email addresses, dates of birth, and the user’s approximate geographic location. Under Armour confirmed some sensitive information was taken in the breach.