Adobe has patched a vulnerability in its flagship document-reading apps, Acrobat DC, Reader DC and Acrobat 2024, that hackers have been actively exploiting for at least four months. The vulnerability, officially tracked as CVE-2026-34621, allows hackers to remotely plant malware on a person’s device by tricking them into opening a maliciously crafted PDF file on their Windows device or macOS computer. The exploit targets a vulnerability in some versions of the Adobe Reader software. It is not ye...