Prototype Pollution Vulnerability in Adobe Acrobat Reader
CVE-2026-34621

9.6CRITICAL

Key Information:

Vendor

Adobe
Status
Acrobat Reader
Vendor
CVE Published:
11 April 2026

What is CVE-2026-34621?

Adobe Acrobat Reader is impacted by a Prototype Pollution vulnerability that allows attackers to execute arbitrary code within the context of the current user. This flaw is triggered only when a user interacts with a malicious file, making user awareness essential. It is crucial for users to keep their software updated and exercise caution when opening documents from untrusted sources.

Affected Version(s)

Acrobat Reader 0 <= 26.001.21367

References

https://helpx.adobe.com/security/products/acrobat/apsb26-...
vendor-advisory

CVSS V3.1

Score:
9.6
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.