CISA urges switch to Signal-like encrypted messaging apps after telecom hacks

CISA and the FBI confirmed that Salt Typhoon (UNC2286), a Chinese-backed threat actor, breached multiple telecom providers — including U.S. carriers — and likely had prolonged access enabling potential interception or manipulation of mobile communications; CISA advises high-risk individuals to adopt end-to-end encrypted messaging (Signal), FIDO phishing-resistant MFA, telco PINs, and other mitigations to reduce exposure.