US shares tips to block hackers behind recent telecom breaches

CISA and partner agencies issued guidance after Chinese-linked APT Salt Typhoon breached multiple major telecom providers (including AT&T, T‑Mobile, Verizon, and Lumen), reportedly maintaining months-long access, stealing customer call records and law-enforcement request data, and gaining access to a U.S. government wiretapping platform; the advisory outlines hardening, visibility, and monitoring best practices to mitigate exploitation of unpatched or exposed services.