The Cybersecurity and Infrastructure Security Agency (CISA) has published an alarming warning indicating that state-backed Chinese hackers have deep penetration into “major” US telcos, and are getting in by compromising an assortment of networking equipment and routers. The report declined to name specific impacted telcos, but did indicate that this is not a case of zero-day exploits or even any sort of advanced tradecraft; the Chinese hackers appear to be using published exploits on various types of equipment that have simply not been patched or remediated. Chinese hackers have established “broad network” of compromised infrastructure The advisory is a joint…