CVE entry · CVE-2009-3459
CVE-2009-3459: Adobe Acrobat and Reader Heap-Based Buffer Overflow Vulnerability
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.
- Actively exploited: added to CISA’s KEV catalog on May 20, 2026.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: June 3, 2026.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes Adobe Acrobat and Reader, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.
References
Other Adobe vulnerabilities
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Adobe Commerce and Magento Incorrect Authorization Vulnerability
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Adobe Commerce and Magento Improper Neutralization of Special Elements Used in a Template Engine Vulnerability
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Adobe ColdFusion Path Traversal Vulnerability
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Adobe Acrobat and Reader Prototype Pollution Vulnerability
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Adobe Acrobat Use-After-Free Vulnerability
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Adobe Commerce and Magento Improper Input Validation Vulnerability