VulnerabilityALERT High

CVE-2026-34621: Adobe Acrobat and Reader Prototype Pollution Vulnerability

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

Impact

CISA lists CVE-2026-34621 as known exploited in the wild for Adobe Acrobat and Reader. Ransomware campaign use: Unknown. Federal remediation due date: 2026-04-27.

Recommended 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.

Published: 4/13/2026, 12:00:00 AMSource: CISA Known Exploited Vulnerabilities CatalogTags: CVE-2026-34621, Adobe, Acrobat and Reader, CISA KEV, CWE-1321