A WhatsApp security vulnerability could allow attackers to crash the iOS app as soon as you answer a call , and could potentially be used to hack your iPhone … The Register reports Vulnerability-related.DiscoverVulnerability that the flaw was reported Vulnerability-related.DiscoverVulnerability to WhatsApp in August , and has been patched Vulnerability-related.PatchVulnerability in the latest version – so you ’ ll want to check for an update . Google Project Zero whizkid and Tamagotchi whisperer Natalie Silvanovich discovered and reported Vulnerability-related.DiscoverVulnerability the flaw , a memory heap overflow issue , directly to WhatsApp in August . Now that a fix is out Vulnerability-related.PatchVulnerability , Silvanovich can go public Vulnerability-related.DiscoverVulnerability with details on the potentially serious flaw . According to Silvanovich’s report Vulnerability-related.DiscoverVulnerability , the bug is triggered when a user receives a malformed RTP packet , triggering the corruption error and crashing the application . In practice , the malformed packet that triggers the crash could be sent via a simple call request . “ This issue can occur when a WhatsApp user accepts a call from a malicious peer , ” Silvanovich explained . It ’ s not clear whether the WhatsApp security flaw could be exploited Vulnerability-related.DiscoverVulnerability for remote code execution , but this is a possibility , and a sufficient risk for a fellow Google researcher to describe Vulnerability-related.DiscoverVulnerability it as ‘ a big deal. ’ “ This is a big deal , ” tweeted Travis Ormandy . “ Just answering a call from an attacker could completely compromise WhatsApp. ” The same vulnerability was present in Vulnerability-related.DiscoverVulnerability the Android app , which has also been patched Vulnerability-related.PatchVulnerability . The Register says it is still waiting to hear from Google on more details , for example whether the desktop app is similarly affected Vulnerability-related.DiscoverVulnerability . It ’ s not the first time of late that a WhatsApp security issue has been identified Vulnerability-related.DiscoverVulnerability . Back in August , it was discovered Vulnerability-related.DiscoverVulnerability that it was possible for an attacker to change both the content and the sender of a WhatsApp message after you ’ ve received it .