High severity8.6CISA KEVNVD Advisory· Published Apr 11, 2026· Updated Jun 17, 2026
CVE-2026-34621
CVE-2026-34621
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
4cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*+ 2 more
- cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*range: >=24.0.0,<24.001.30362
- cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*range: <26.001.21411
- (no CPE)range: <=24.001.30356, <=26.001.21367
- cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*Range: <26.001.21411
Patches
Vulnerability mechanics
References
2- helpx.adobe.com/security/products/acrobat/apsb26-43.htmlnvdVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalognvdUS Government Resource
News mentions
4- CISA orders feds to patch max severity ColdFusion flaw by FridayBleepingComputer · Jul 8, 2026
- Max severity Adobe ColdFusion flaw now exploited in attacksBleepingComputer · Jul 6, 2026
- Adobe patches seven max severity ColdFusion, Campaign flawsBleepingComputer · Jul 1, 2026
- Patch Tuesday, April 2026 EditionKrebs on Security · Apr 14, 2026