A major security defect in the ESIM high system could endanger billions of devices – here is what we know

• An ESIM test profile used by billions of devices brought a major defect
• It allowed malicious actors with physical access the possibility of deploying applets
• A fix is now available, so users should upgrade now

Security researchers have discovered a vulnerability of ESIM technology used in almost all smartphones and many other intelligent devices connected to the Internet.

In theory, the fault could have been abused to intercept or manipulate communications, extract sensitive data, inject malicious applets, etc.