Adobe Acrobat and Reader Prototype Pollution Vulnerability

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• NewsExploited · CISA KEVAdobe · Acrobat and Reader

  Adobe Acrobat and Reader Prototype Pollution Vulnerability

  CVE-2026-34621

  Adobe Acrobat and Reader contain a prototype pollution vulnerability that allows for arbitrary code execution.

  CISA's required action · due 27 Apr 2026 for U.S. federal civilian agencies

  Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  Cited by CISA: helpx.adobe.com · nvd.nist.gov

  Added to KEV 13 Apr 2026 · Source checked 4 Nov 2026, 16:35 UTC · CISA KEV entry

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