CVE-2026-34621
HIGH CISA KEV EPSS 93.4%
Published Apr 11, 20262mo ago · Modified Jun 17, 20261w ago
8.6 CVSS 3.1
Published Apr 11, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago
KEV Listed Apr 13, 2026 2mo ago
KEV Due Apr 27, 2026 65d overdue
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality High
Integrity High
Availability High
Threat Intelligence
CISA Known Exploited Overdue 65d
- Added
- Apr 13, 2026
- Due
- Apr 27, 2026
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
EPSS Exploit Probability
93.4% percentile
Exploit & Patch Status
Actively Exploited (KEV)
No Patch Available
Weaknesses 1
CWE-1321
Affected Products 8
References 2
- helpx.adobe.com https://helpx.adobe.com/security/products/acrobat/apsb26-43.html
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34621
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.