Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since May 20, 2026.
CVE-2009-3459
Adobe Acrobat and Reader Heap-Based Buffer Overflow Vulnerability
Added to KEV May 20, 2026
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2009-3459
- CWE
- CWE-119
- Affected products
- Acrobat and Reader · Adobe Acrobat and Reader · Adobe
What happened
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.
What it means for your business
Adobe Acrobat and Reader is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2009-3459). 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. CISA remediation due date: 2026-06-03. If you need help checking exposure, call (864) 335-9223.
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.
CISA due date: June 3, 2026
Sources
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