CVE-2026-34621 — Adobe Acrobat and Reader Prototype Pollution Vulnerability
CVE-2026-34621: Adobe Acrobat and Reader Prototype Pollution Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Adobe |
| Product | Acrobat and Reader |
| Date added | 2026-04-13 |
| Due date | 2026-04-27 |
| Ransomware campaign use | Unknown |
Description
Adobe Acrobat and Reader contain a prototype pollution vulnerability that allows for arbitrary code execution.
Required action (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.
Notes
https://helpx.adobe.com/security/products/acrobat/apsb26-43.html ; https://nvd.nist.gov/vuln/detail/CVE-2026-34621
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34621
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog