The Chinese sponsored hacking group know as Salt Typhoon intercepted the communications of hundreds of millions of American residents, businesses, and institutions. From that position, they could do NSA-style metadata-analysis, malware injection, and interception of unencrypted traffic. And they *didn't have to hack anything*, because the US government insists that all networking gear ship *pre-hacked* so that cops can get into it.
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This isn't even the first time that CALEA back doors have been exploited by a hostile foreign power as a matter of geopolitical skullduggery. In 2004-2005, Greece's telecommunications were under mass surveillance by US spy agencies who wiretapped Greek officials, all the way up to the Prime Minister, in order to mess with the Greek Olympic bid:
https://en.wikipedia.org/wiki/Greek_wiretapping_case_2004%E2%80%9305
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