Adobe Patches Acrobat Reader 0-Day Vulnerability Exploited in the Wild

Adobe released an emergency patch for CVE-2026-34621, a critical Prototype Pollution vulnerability in Acrobat Reader that is being actively exploited via specially crafted PDF attachments to achieve arbitrary code execution; organizations are urged to apply Adobe's updates immediately, block suspicious PDF attachments, reinforce security awareness, and use EDR tools to detect post-exploitation activity.