The FBI or CIA would keep any vulnerabilities secret. But here is a recent example: https://www.businessinsider.com/us-accuses-huawei-of-spying-through-law-enfo

The FBI or CIA would keep any vulnerabilities secret. But here is a recent example: https://www.businessinsider.com/us-accuses-huawei-of-spying-through-law-enforcement-backdoors-2020-2 https://www.businessinsider.com/us-accuses-huawei-of-spying-...