WhatsApp has uncovered a rare software bug that could have been abused to activate malware on a Windows PC. The software bug, dubbed CVE-2025-30401, affects the Windows version of WhatsApp, which can display previews of attached images or documents within a chat.

Do you use WhatsApp? If so, you need to be especially careful right now because there’s a security vulnerability in the Windows version—which many people still use every day—that can infect your PC with malware.

What a MIME field A bug in WhatsApp for Windows can be exploited to execute malicious code by anyone crafty enough to persuade a user to open a rigged attachment - and, to be fair, it doesn't take much craft to pull that off.