CVE-2026-34621 | Adobe Acrobat Reader up to 24.001.30356/26.001.21367 File prototype pollution (apsb26-43)

A vulnerability has been found in Adobe Acrobat Reader up to 24.001.30356/26.001.21367 and classified as critical. Affected by this vulnerability is an unknown functionality of the component File Handler. Performing a manipulation results in improperly controlled modification of object prototype attributes.

This vulnerability is identified as CVE-2026-34621. The attack can be initiated remotely. There is not any exploit available.

The affected component should be upgraded.