CVE WatchAug 28, 2026

CVE-2026-34621

Adobe Acrobat and Reader Prototype Pollution Vulnerability

CVSS

8.6

High

EPSS

7.1%

p94

KEV

YES

Apr 13, 2026

Exploit Today

0-100

Published: Apr 11, 2026 · Last modified: Aug 28, 2026 · CWE-1321

EPSS · 30d

7.1%EPSS · 30 days7.1%

2026-08-022026-08-31

KEV catalog record

Product

Adobe / Acrobat and Reader

Vulnerability

Adobe Acrobat and Reader Prototype Pollution Vulnerability

Added to KEV

Apr 13, 2026

Remediate by

Apr 27, 2026

Known ransomware use

Summary 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

Technical description

Acrobat Reader versions 24.001.30356, 26.001.21367 and earlier are affected by an Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Official references

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