CVE-2009-3459: Adobe Acrobat and Reader Heap-Based Buffer Overflow Vulnerability

Added to the CISA Known Exploited Vulnerabilities catalog on 20 May 2026. Vendor: Adobe. Product: Acrobat and Reader.

Adobe Acrobat and Reader contain a heap-based buffer overflow vulnerability which could allow remote attackers to execute arbitrary code via a crafted PDF file that triggers memory corruption.

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. (due 03 Jun 2026)