WhatsApp and Telegram are two of the most important and most used messaging applications for mobile phones, but unfortunately it seems that they have a very serious problem, and you can see what it all boils down to. Basically, both WhatsApp and Telegram have problems because of the way they store pictures and video clips in phones with the Android operating system, which can be accessed and even allow conversations to be compromised.
WhatsApp, like Telegram, by default use the external storage medium to save pictures sent by anyone, but unfortunately this means that if the phone is infected with malware, hackers have immediate access to them. External storage media can be very easily infected by malware, and when users of the WhatsApp or even Telegram applications receive pictures, they can be modified by hackers, or other data from the applications can be accessed through them.
Telegram, WhatsApp have a very SERIOUS PROBLEM on Phones
WhatsApp has demonstrated the problem in the video clips above, a hacker being able to modify any kind of received photos, so that the photos are modified in real time even before they are visible in previews. The demonstration above shows how the faces of some people in a picture received through WhatsApp were modified immediately after the picture was received on the phone, and the user will never know what is happening.
WhatsApp can have not only the pictures modified by hackers using this very serious problem, but also the audio messages sent by any people, so the real messages disappear before they are listened to. Everything happens without the person who receives the message having any vague idea about the fact that a malware in the phone makes all these changes, and the only solution is to save the content in the phone's internal space.