April 13, 2026 · Applied Cybernetics Group
CVE-2026-34621 — Adobe Acrobat and Reader
Adobe Acrobat and Reader Prototype Pollution Vulnerability
- Added to KEV
2026-04-13- Federal due date
2026-04-27- Vendor
- Adobe
- Product
- Acrobat and Reader
- EPSS
- 93.5th percentile (score 0.071, as of
2026-07-13) - NVD CVSS v3.1
- 8.6 (HIGH)
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2026-34621
CISA short description
Adobe Acrobat and Reader contain a prototype pollution vulnerability that allows for arbitrary code execution.
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.
NVD 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.