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[ CVE-2009-3459 · Published 13 Oct 2009 ]

Adobe Acrobat and Reader Heap-Based Buffer Overflow Vulnerability

Exploited · CISA KEV CVSS 8.8 EPSS 87%Fix available

[ Why it matters ]Priority signals

  • Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2026-05-20
  • EPSS: 87% chance of exploitation in the next 30 days (higher than 100% of CVEs)

[ Description ]Official description

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.

CISA: 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.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 3 Jun 2026): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

[ References ]References