Cyber attack on WhatsApp data calls : WhatsApp confirms

WhatsApp admitted a major cybersecurity breach that has enabled targeted spyware to be installed on phones through voice calls. The security vulnerability affects both iPhone and Android devices, with malicious code (allegedly) from Israel’s NSO Group, transmitted whether or not a user answers an infected call.

the attack has all the hallmarks of a private company known to work with governments to deliver spyware that reportedly takes over the functions of mobile phone operating systems. We have briefed a number of human rights organizations to share the information we can, and to work with them to notify civil society.

WhatsApp to Financial Times

How it works?

WhatsApp vulnerability is a buffer overflow weakness, enabling malicious code to be inserted into data packets sent during the process of starting a voice call. When the data is received, WhatsApp’s internal buffer is forced to overflow, overwriting other parts of the app’s memory, and control is given over to the application.

WhatsApp Version under threat

  • WhatsApp for Android prior to v2.19.134
  • WhatsApp Business for Android prior to v2.19.44
  • WhatsApp for iOS prior to v2.19.51
  • WhatsApp Business for iOS prior to v2.19.51
  • WhatsApp for Windows Phone prior to v2.18.348
  • WhatsApp for Tizen prior to v2.18.15.


WhatsApp said “we encourage 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.”

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