Adobe issues emergency fix for Acrobat Reader flaw exploited in the wild (CVE-2026-34621)
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-34621 | Actively Exploited Prototype Pollution RCE in Adobe Acrobat and Reader | 8.6 | 7% | KEV | KEV |
From the original article
1 min read at helpnetsecurity.com
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. CVE-2026-34621 is a critical prototype pollution vulnerability – a type of vulnerability that occurs in JavaScript and allows attackers to add or modify an application’s JavaScript objects and properties.
By @zeljkazorz · helpnetsecurity.com
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