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CVE-2026-34621

8.6 high KEV · due 2026-04-27 exploit ×5 SSVC exploitation: active Analyzed
NVD · CVE.org · CISA KEV

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.

Fix

Public exploits 5

Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.

CISA KEV required action · due 2026-04-27

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Added to the catalog 2026-04-13. CISA KEV

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 8.6 · in KEV · adobeNVD modified 2026-10-26 21:10

Affected (CPE criteria) 3

  • cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*
  • cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*
  • cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*

References 2