CVE-2026-34621
Adobe Acrobat DC, Adobe Acrobat Reader DC, Adobe Acrobat 2024
Published 11 Apr 2026 · updated 28 Aug 2026 · Analyzed
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 13 Apr 2026, with a remediation deadline of 27 Apr 2026 for US federal agencies.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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.
References
- helpx.adobe.com/security/products/acrobat/apsb26-43.html · Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34621 · US Government Resource