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Actively exploited

CVE-2009-3953 Adobe Acrobat and Reader Universal 3D Remote Code Execution Vulnerability

Adobe Acrobat and Reader contains an array boundary issue in Universal 3D (U3D) support that could lead to remote code execution.

From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.

Our Assessment

Should You Worry?

Patch urgentlyCybergen assessment
  • CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 8 Jun 2022.
  • Rated High severity (CVSS 8.8, scored by CISA).
  • It has been in the catalogue for 1,612 days. Systems still unpatched now have almost certainly been scanned for it.
The Vulnerability

What It Is

The U3D implementation in Adobe Reader and Acrobat 9.x before 9.3, 8.x before 8.2 on Windows and Mac OS X, and 7.x before 7.1.4 allows remote attackers to execute arbitrary code via malformed U3D data in a PDF document, related to a CLODProgressiveMeshDeclaration "array boundary issue," a different vulnerability than CVE-2009-2994.

From Watch to Action

What To Do Now

  1. 1

    Find it

    Search your asset inventory and external attack surface for Adobe Acrobat and Reader. Include cloud images, appliances and anything a supplier runs for you.

    Attack Surface Management
  2. 2

    Fix it

    Apply updates per vendor instructions.

    Vulnerability Management
  3. 3

    Hunt for compromise

    If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.

    Incident Response
  4. 4

    Prove it is fixed

    Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.

    Penetration Testing

Vendor Advisories

Regulation

The Compliance Clock

Cyber EssentialsRated high, so if it affects devices in your Cyber Essentials scope, the update must be installed within 14 days of the vendor releasing it.NIS2If exploitation causes a significant incident, essential and important entities owe their CSIRT an early warning within 24 hours and a notification within 72 hours.DORAFinancial entities must classify ICT incidents and send an initial notification for a major incident within strict deadlines, with exploited flaws a common cause.US federal (BOD 22-01)Federal civilian agencies had until 22 Jun 2022 to remediate. A sensible benchmark for everyone else.

General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.

Stay Ahead

More Exploited Adobe Flaws

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CVE-2026-48356Adobe Commerce and Magento Unrestricted Upload of File with Dangerous Type VulnerabilityAdded 27 Oct 2026CVE-2026-71362Adobe Commerce and Magento Incorrect Authorization Vulnerability Added 24 Sep 2026CVE-2026-75650Adobe Commerce and Magento Improper Neutralization of Special Elements Used in a Template Engine VulnerabilityAdded 8 Sep 2026CVE-2026-48282Adobe ColdFusion Path Traversal VulnerabilityAdded 7 Jul 2026CVE-2009-3459Adobe Acrobat and Reader Heap-Based Buffer Overflow VulnerabilityAdded 20 May 2026CVE-2020-9715Adobe Acrobat Use-After-Free VulnerabilityAdded 13 Apr 2026

All 83 exploited Adobe vulnerabilities

Not Sure If You Are Exposed?

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Evidence

Sources

  1. CISA Known Exploited Vulnerabilities catalogue
  2. NVD: CVE-2009-3953
  3. CVE record: CVE-2009-3953
  4. FIRST EPSS
  5. metasploit.com/modules/exploit/windows/fileformat/adobe_u3d_meshdecl
  6. secunia.com/advisories/38138
  7. oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8242
  8. adobe.com/support/security/bulletins/apsb10-02.html
  9. redhat.com/support/errata/RHSA-2010-0060.html
  10. vupen.com/english/advisories/2010/0103
  11. securitytracker.com/id?1023446
  12. osvdb.org/61690