CVE-2026-34621 Details
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.
A prototype pollution vulnerability has been identified in Adobe Acrobat and Acrobat Reader DC. This issue affects versions through 26.001.21367 and in Acrobat 2024 versions through 24.001.30356. The vulnerability allows for improper control over the modification of object prototype attributes, which could lead to arbitrary code execution in the context of the current user. Exploitation requires user interaction, as a victim must open a malicious file.
Users are advised to update to the latest versions of Adobe Acrobat or Acrobat Reader DC. The latest versions can be downloaded from the Adobe website or via the Adobe Update mechanism. For IT administrators, updates are available through the Microsoft Store for Business, via the Adobe Creative Cloud Packager, or through standard deployment methods such as SCCM.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 11, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34621 | CISA-ADP | US Government Resource |
| https://helpx.adobe.com/security/products/acrobat/apsb26-43.html | [email protected] | Vendor Advisory |
This CVE is in CISA's Known Exploited Vulnerabilities Catalog
Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.
| Vulnerability Name | Date Added | Due Date | Required Action |
|---|---|---|---|
| Adobe Acrobat and Reader Prototype Pollution Vulnerability | Apr 13, 2026 | 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. |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1321 | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| adobe acrobat dc | < 26.001.21411 |
CPE
Remediation
| |
| adobe acrobat reader dc | < 26.001.21411 |
CPE
Remediation
| |
| apple macos | All versions |
CPE
Remediation
| |
| microsoft windows | All versions |
CPE
Remediation
| |
| adobe acrobat | >= 24.0.0, < 24.001.30362 >= 24.0.0, < 24.001.30360 |
CPE
Remediation
| |
Change History
9 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 28, 2026 | CVE Modified | [email protected] |
| Aug 27, 2026 | CVE Modified | [email protected] |
| Aug 27, 2026 | CVE Modified | CISA-ADP |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Apr 13, 2026 | Initial Analysis | [email protected] |
| Apr 13, 2026 | CVE Modified | CISA-ADP |
| Apr 12, 2026 | CVE Modified | [email protected] |
| Apr 11, 2026 | New CVE Received | [email protected] |