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OpenAdvisories
High · 8.6 Known exploited Public exploit CVE-2026-34621 EUVD-2026-21675GHSA-vcqh-932g-m3qj

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

Published Apr 11, 2026 · Updated Aug 27, 2026 · Assigned by adobe

Vendor: Adobe Product: Acrobat 2024 Product: Acrobat DC Product: Acrobat Reader DC

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

VendorProductAffectedFixed
Adobe Acrobat DC ≤ 26.001.21367 26.001.21411
Adobe Acrobat Reader DC ≤ 26.001.21367 26.001.21411
Adobe Acrobat 2024 ≤ 24.001.30356 24.001.30362 (Win), 24.001.30360 (Mac)

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 5 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 2

References