Authored by Sophia Lam via The Epoch Times (emphasis ours),

U.S. security agencies have warned that hackers backed by the Chinese regime have been targeting "major telecommunications companies and network service providers" since 2020.

In a June 7 cybersecurity advisory, they urged those affected to take immediate remedial action.

The advisory, coauthored by the National Security Agency (NSA), the Cybersecurity and Infrastructure Security Agency (CISA), and the Federal Bureau of Investigation (FBI), said the hackers "continue to exploit publicly known vulnerabilities," using tactics to bypass defenses and keeping themselves undetected.