SB2026041109 - Remote code execution in Adobe Acrobat and Reader
Published: April 11, 2026
Security Bulletin ID
SB2026041109
Severity
Critical
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Prototype pollution (CVE-ID: CVE-2026-34621)
The vulnerability allows a remote attacker to execute arbitrary JavaScript code.
The vulnerability exists due to improper input validation when handling PDF files. A remote attacker can trick the victim into opening a specially crafted PDF file and execute arbitrary code on the system.
Note, the vulnerability is being actively exploited in the wild.
Remediation
Install update from vendor's website.