Threat actors have been exploiting a previously unknown
zero-day vulnerability in Adobe Reader using maliciously crafted
PDF documents since at least December 2025. The finding,
detailed by EXPMON's Haifei Li, has been described as a
highly-sophisticated PDF exploit. The artifact
("Invoice540.pdf") first appeared on the VirusTotal platform on
November 28, 2025. A second
Read more https://thehackernews.com/2026/04/adobe-reader-zero-day-exploited-via.html
