Adobe has pushed out an emergency security update for Adobe Acrobat Reader, patching a zero-day vulnerability (CVE-2026-34621) exploited in the wild since November 2025. About CVE-2026-34621 CVE-2026-34621 is a critical prototype pollution vulnerability – a t…
Adobe issues emergency fix for Acrobat Reader flaw exploited in the wild (CVE-2026-34621)
Adobe issued an emergency patch for a critical zero-day vulnerability (CVE-2026-34621) in Adobe Acrobat Reader, a prototype pollution flaw actively exploited since November 2025. This vulnerability allows attackers to execute arbitrary code or escalate privileges on affected systems, impacting all users of Adobe Acrobat Reader running unpatched versions prior to the latest emergency fix.