“WhatsApp and Telegram, both the messaging services that claim to offer end-to-end encryption for chats, can witness hackers logging into user chats and even replying on their behalf, according to a new research. The vulnerability mainly stems from the Signaling System 7 (SS7), which is an international telecommunications standard that states how network elements exchange information over a signalling network.”
Source: Hackers can impersonate victims and reply to WhatsApp and Telegram chats
