CISA-confirmed known exploited vulnerability

CVE-2009-4324

Adobe Acrobat and Reader Use-After-Free Vulnerability

Adobe · Acrobat and Reader

Vulnerability details

Use-after-free vulnerability in Adobe Acrobat and Reader allows remote attackers to execute code via a crafted PDF file.

Added to CISA KEV: 2022-06-08

Ransomware campaign use: Unknown

CISA due date: 2022-06-22

Defensive guidance from CISA

Apply updates per vendor instructions.

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.

Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC

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