Researchers: attackers have been exploiting a zero-day vulnerability in Adobe Reader since at least December 2025, and some docs contain Russian-language lures BleepingComputer 2026-04-10 Sergiu Gatlan Adobe Reader, Russian Related Coverage Months-old Adobe Reader zero-day uses PDFs to size up targets The Register · Carly Page Hackers have been exploiting an unpatched Adobe Reader vulnerability for months CSO · Howard Solomon Malicious PDF reveals active Adobe Reader zero-day in the wild Security Affairs · Pierluigi Paganini Zero Days for the Masses: Mythos Presages Exploit Tsunami GovInfoSecurity.com · Mathew J. Schwartz Adobe Reader Zero-Day Exploited to Steal Data via Malicious PDFs Hackread · Deeba Ahmed Adobe Acrobat Reader Zero Day Exploited in Active PDF Attacks eSecurity Planet · Ken Underhill Adobe Reader 0day abused in wild to deliver three-stage exploit chain The Stack · Edward Targett Acrobat Reader zero-day exploited in the wild for many months Help Net Security · Zeljka Zorz EXPMON detected sophisticated zero-day fingerprinting attack targeting Adobe Reader users Haifei's random thoughts · Haifei Discussion r/cybersecurity r on reddit Hackers exploiting Acrobat Reader zero-day flaw since December