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.
CISA Known Exploited Vulnerability
Date added 2026-04-13 | Due date 2026-04-27
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Problem types
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)
Product status
Any version
References
www.cisa.gov/...erabilities-catalog?field_cve=CVE-2026-34621
helpx.adobe.com/security/products/acrobat/apsb26-43.html