Adobe Acrobat Extension Flaw Let Malicious Sites Read WhatsApp Web Data

Cybersecurity researchers have disclosed details of a now-patched vulnerability chain in the Adobe Acrobat Chrome extension that has over 314 million users, which, if exploited, could facilitate a silent hijack of a user’s WhatsApp data.

The shortcoming has been codenamed HermeticReader by Guardio Labs. It’s officially tracked as CVE-2026-48294 (CVSS score: 7.4), with the vulnerability