# CVE-2026-34621

## Summary

- **CVE ID:** CVE-2026-34621
- **Severity:** HIGH
- **CVSS Score:** 8.6 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H)
- **CWE:** CWE-1321
- **Published:** Apr 11, 2026
- **Last Modified:** Aug 27, 2026

## 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.

## Affected Products

- Adobe — Acrobat Reader (0)
- Adobe — Acrobat DC (0)
- Adobe — Acrobat DC (26.001.21411)
- Adobe — Acrobat Reader DC (0)
- Adobe — Acrobat Reader DC (26.001.21411)
- Adobe — Acrobat 2024 (0)
- Adobe — Acrobat 2024 (24.001.30362 (Win), 24.001.30360 (Mac))

## References

- [CNA](https://helpx.adobe.com/security/products/acrobat/apsb26-43.html)
- [CISA-ADP](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34621)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 7.09%
- **EPSS Percentile:** 93.8

## Known Exploited Vulnerabilities (KEV)

- **Date Added:** Apr 13, 2026
- **Due Date:** Apr 27, 2026

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._