Kaspersky Lab’s security researchers say the zero-day vulnerability can be used to deliver multi-purpose malware to computer users using the Telegram Desktop app, including backdoors and crypto-cash mining software. The security company also discovered that hackers had actively exploited the vulnerability in the Telegram Desktop app, which is based on the right-to-left override Unicode method, since March last year, but only to mine cryptocurrencies like Fantomcoin, Monero, and Zcash. Once the zero-day vulnerability was successfully exploited, hackers were able to install a backdoor on your computer using the Telegram API as both a command and control protocol, which means they could gain remote access to your PC.
— source news.softpedia.com