Adobe Acrobat and Reader Prototype Pollution Vulnerability

Technical Severity

CVSS v3.1 Metrics

HIGH

8.6 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Exploitation Likelihood

EPSS Prediction

8.71 %

Predictive Probability

Percentile Rank

92.5 th

Documented as more likely to be exploited than 92.5% of known CVEs.

Detection Date

Apr 13, 2026

Remediation Due

Apr 27, 2026

CISA Catalog Active

Threat Analysis

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

Remediation Directive

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

External Intelligence

https://helpx.adobe.com/security/products/acrobat/apsb26-43.html

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2026-34621