CVE-2026-34621

Vulnerability details

Adobe Acrobat and Reader contain a prototype pollution vulnerability that allows for arbitrary code execution.

Added to CISA KEV: 2026-04-13

Ransomware campaign use: Unknown

CISA due date: 2026-04-27

Defensive guidance from CISA

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.