What is the Acrobat Reader zero-day exploit?

A fingerprinting PDF attack hitting latest Reader versions, stealing data via APIs without extra clicks. Active since December.

How long has Adobe Reader zero-day been exploited?

At least four months, per Haifei Li's EXPMON analysis. Russian phishing ties confirmed.

Is Adobe Reader safe to use now?

Nope—patch pending. Avoid untrusted PDFs; block "Adobe Synchronizer" User-Agent.

🕳️ Vulnerabilities & CVEs

Adobe Reader Zero-Day: Hackers Feast for Months

Forget trusting that shady PDF. Hackers have been looting Adobe Reader users for months via a sneaky zero-day. Time to ditch the open-all-files habit.

theAIcatchup Apr 09, 2026 3 min read

Malicious PDF document exploiting Adobe Acrobat Reader zero-day vulnerability

⚡ Key Takeaways

Zero-day in Adobe Reader exploited since Dec via malicious PDFs—no user interaction needed. 𝕏
Attackers steal data with APIs, prep for RCE; Russian oil/gas phishing lures. 𝕏
Mitigate by skipping shady PDFs, blocking specific User-Agent; Adobe silent on patch. 𝕏

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#Adobe Reader zero-day #Haifei Li #PDF exploit #russian phishing

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Originally reported by Bleeping Computer

⚡ Key Takeaways

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