CVE-2026-34621

Published Apr 11, 2026

Last updated 14 hours ago

Exploit known CVSS high 8.6

Acrobat Reader

Overview

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.
Source: psirt@adobe.com
NVD status: Analyzed
Products: acrobat_dc, acrobat_reader_dc, acrobat

Risk scores

CVSS 3.1

Type: Secondary
Base score: 8.6
Impact score: 6
Exploitability score: 1.8
Vector string: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Severity: HIGH

Known exploits

Data from CISA

Vulnerability name: Adobe Acrobat and Reader Prototype Pollution Vulnerability
Exploit added on: Apr 13, 2026
Exploit action due: Apr 27, 2026
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.

Weaknesses

psirt@adobe.com: CWE-1321

Hype score is a measure of social media activity compared against trending CVEs from the past 12 months. Max score 100.

Hype score: 4

Configurations

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References

Sources include official advisories and independent security research.