CVE-2026-34621

Acrobat Reader | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)

State: Published
Severity: 8.6 High
Published: Apr 11, 2026
Updated: Aug 27, 2026
Reserved: Mar 30, 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.

Scores

CVSS	Score	Vector	Source
3.1	8.6 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H	adobe

Weaknesses

CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)

Affected Products

Product	Versions
Acrobat DCAdobe	26.001.21367 and earlierAffected 26.001.21411Not affected
Acrobat Reader DCAdobe	26.001.21367 and earlierAffected 26.001.21411Not affected
Acrobat 2024Adobe	24.001.30356 and earlierAffected 24.001.30362 (Win), 24.001.30360 (Mac)Not affected

References

https://helpx.adobe.com/security/products/acrobat/apsb26-43.htmlvendor-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34621government-resource

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