Adobe Acrobat Zero-Day CVE-2026-34621: Four Months of Targeted Espionage via Prototype Pollution Exploit
Adobe patched a critical zero-day in Acrobat Reader (CVE-2026-34621) that was exploited for at least four months via a sophisticated prototype pollution technique. The attack chain enables full sandbox escape and arbitrary code execution, and was used in a targeted espionage campaign against the energy sector.
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