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

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2026-05-20. EPSS: 86.6% chance of exploitation in the next 30 days.

Heap-based buffer overflow in Adobe Reader and Acrobat 7.x before 7.1.4, 8.x before 8.1.7, and 9.x before 9.2 allows remote attackers to execute arbitrary code via a crafted PDF file that triggers memory corruption, as exploited in the wild in October 2009. NOTE: some of these details are obtained from third party information.

Affected products

• Adobe Acrobat: from 7.0, before 7.1.4 (fixed in 7.1.4); from 8.0, before 8.1.7 (fixed in 8.1.7); from 9.0, before 9.2 (fixed in 9.2)
• Adobe Acrobat Reader: from 7.0, before 7.1.4 (fixed in 7.1.4); from 8.0, before 8.1.7 (fixed in 8.1.7); from 9.0, before 9.2 (fixed in 9.2)

Published 2009-10-13. Last modified 2026-06-16.