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"Highly risky": Sidid gap at WhatsApp - these cell phones are affected hackers use a security gap to lock on cell phones via WhatsApp spyware.Which devices are affected and how to protect yourself from the cyber attack, September 18, 2025 at 8:06 a.m. Hackers take advantage of a weak point in WhatsApp to smuggle spyware on certain cell phones and other devices.In this way, those affected can protect themselves.Nico Tapia/dpa Anyone who uses the WhatsApp messenger service on a cell phone must urgently become active.A heavy security gap in connection with the intelligence service was recently discovered. Heavy security gap at WhatsApp At the WhatsApp messenger service, a heavy vulnerability was found that have already actively exploited cybercriminals.It is possible for the hackers to load malware onto the mobile phone through the security gap. "The Hacker News" reports that it is a zero-click security gap.The gap therefore bears the identification CVE-2025-55177 and can insert spyware onto the affected end device via the pure receipt of images. The attackers send manipulated images over which malware is locked onto the cell phone.With this security problem, the hackers do not rely on the fact that their potential victims actively click on a link or download something.The preview of the image alone is sufficient to infect the device.Thus, the attack is often unnoticed at first. These cell phones are affected Most Samsung cell phones are affected because the security gap on devices that run under Android 13 to 16.Users of iOS and MacOS devices are also affected. In this way, those affected close the vulnerability Samsung has already acted and released an update that closes the vulnerability.To get this update, Samsung users should check as soon as possible on their Samsung Galaxy whether the security update for September is already available for download. Whether this is the case can be seen in the settings under the menu item "Software update".As soon as the September update appears here, it should be downloaded and installed immediately. Apple has released the iOS version 18.6.2 to fix the problem.This should also be downloaded immediately if it is available.