CVE-2026-34621

Adobe Acrobat and Reader Prototype Pollution Vulnerability

Adobe — Acrobat and Reader

Added to KEV catalog: 13 April 2026
Federal remediation due date: 27 April 2026
Weakness classification (CWE): CWE-1321

CISA Description

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

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.

Notes

https://helpx.adobe.com/security/products/acrobat/apsb26-43.html ; https://nvd.nist.gov/vuln/detail/CVE-2026-34621

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