Adobe.Acrobat.CVE-2026-34621.Improper.Input.Validation

Description

This indicates an attack attempt to exploit an Improper Input Validation vulnerability in Adobe Acrobat and Reader.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted PDF file. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application via a crafted PDF file.

Affected Products

Adobe Acrobat Reader DC version for Windows 26.001.21367 and earlier
Adobe Acrobat Reader DC version for Macintosh 26.001.21367 and earlier

Impact

System Compromise: Remote attackers can gain control of vulnerable systems.

Recommended Actions

Apply the most recent upgrade or patch from the vendor.
https://helpx.adobe.com/security/products/acrobat/apsb26-43.html

References