ACTIVELY EXPLOITED
CVE-2026-34621: Adobe Acrobat and Reader Prototype Pollution Vulnerability
| Vendor | Adobe |
|---|---|
| Product | Acrobat and Reader |
| Actively exploited | Yes |
| Added to CISA KEV | 13 Apr 2026 |
| CISA federal deadline | 27 Apr 2026 |
| Weakness (CWE) | CWE-1321 |
Required action (CISA's text)
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 (NVD)
Adobe Acrobat and Reader contain a prototype pollution vulnerability that allows for arbitrary code execution.
SOURCES
Other Adobe flaws
- CVE-2026-48356: Adobe Commerce and Magento Unrestricted Upload of File with Dangerous Type Vulnerability
- CVE-2026-71362: Adobe Commerce and Magento Incorrect Authorization Vulnerability
- CVE-2026-75650: Adobe Commerce and Magento Improper Neutralization of Special Elements Used in a Template Engine Vulnerability
- CVE-2026-48282: Adobe ColdFusion Path Traversal Vulnerability
- CVE-2009-3459: Adobe Acrobat and Reader Heap-Based Buffer Overflow Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.