Adobe patches Acrobat Reader zero‑day exploited since Dec 2025 CVE‑2026‑34621 enabled RCE via malicious PDFs Users must ...

Adobe has released a fix for an Acrobat and Reader zero-day that attackers had been exploiting for months. The patch, shipped on April 11, addresses CVE-2026-34621, a critical vulnerability in Acrobat ...

Now a security researcher says a Reader hole has been quietly exploited by malware for as long as four months, fingerprinting ...

Hackers have been quietly exploiting what appears to be a zero-day in Adobe Acrobat Reader for months, using booby-trapped PDFs to profile targets and decide who's worth fully compromising.