The Qualcomm mobile station modem (MSM) series is part of 3G to 5G connectivity for millions of Android phones worldwide. The Check Point security research group now claim that it can be exploited in a way that might allow a hacker to read a user's messages and even listen in on phonecalls. This flaw involves an interface found on up to 30% of all phones worldwide.
https://www.notebookcheck.net/Security-researchers-claim-to-find-a-severe-vulnerability-that-may-affect-up-to-30-of-all-Android-phones-worldwide.538093.0.html