WhatsApp says users to upgrade to the latest version of its application after reporting that users might be vulnerable to having malicious spyware installed on phones without their knowledge.
“WhatsApp encourages people to upgrade to the latest version of our app, as well as keep their mobile operating system up to date, to protect against potential targeted exploits designed to compromise information stored on mobile devices,” a spokesman said.
A vulnerability in WhatsApp allowed attackers to inject spyware on phones by ringing up targets using the app's phone call function. It said the spyware was developed by Israeli cyber surveillance company NSO Group and affects both Android and iPhones. The FT said WhatsApp could not yet give an estimate for how many phones were targeted.
WhatsApp, one of the most popular messaging tools, is used by 1.5 billion people monthly and it has touted its high level of security and privacy, with messages on its platform being encrypted end to end.