Categories alerts ‘DeadRinger’ Targeted Exchange Servers Long Before Discovery Post author By admin Post date August 3, 2021 Cyberespionage campaigns linked to China attacked telecoms via ProxyLogon bugs, stealing call records and maintaining persistence, as far back as 2017. Share this:FacebookX ← ‘PwnedPiper’: Devastating Bugs in >80% of Hospital Pneumatics → CISA and NSA Release Kubernetes Hardening Guidance