Live › vulnerability › CVE-2026-34621
Go to dashboardAdobe Acrobat and Reader contain a prototype pollution flaw that lets a crafted input alter JavaScript object behavior inside the reader. The sources say it allows arbitrary code execution, and CISA lists it as actively exploited.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Adobe Acrobat and Reader | vendor | – | – |
| adobe acrobat dc | vendor | < 26.001.21411 | 26.001.21411 |
| adobe acrobat reader dc | vendor | < 26.001.21411 | 26.001.21411 |
| adobe acrobat | vendor | >= 24.0.0, < 24.001.30362 | 24.001.30362 |
| adobe acrobat | vendor | >= 24.0.0, < 24.001.30360 | 24.001.30360 |
Open Acrobat or Reader and check Help > About to see the installed version, then compare it against Adobe's security bulletin for the fixed build.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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.
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