CVE-2026-34621HIGH 8.6CISA KEVEPSS p93.4%

CVE-2026-34621Adobe Acrobat and Reader Prototype Pollution Vulnerability

Adobe / Acrobat and Reader

Description

Adobe Acrobat and Reader contain a prototype pollution vulnerability that allows for arbitrary code execution.

Scoring

CVSS 3.18.6 (HIGH)
VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS7.09% probability of exploitation · percentile 93.4% · 2026-06-18T12:00:27Z
Published2026-04-11
Last modified2026-04-13

CISA KEV entry

Added to KEV: 2026-04-13

Underlying weaknesses· 1

CWE-1321

References

  1. https://helpx.adobe.com/security/products/acrobat/apsb26-43.html
  2. https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34621

1

TypeTargetConfidenceTier
WeaknessImproperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')cwe-13210%live

(incoming)1

TypeTargetConfidenceTier
KEVEntryAdobe Acrobat and Reader Prototype Pollution Vulnerabilitykev-cve-2026-346210%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2026-34622
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Adobe Acrobat and Reader Out-of-Bounds Write Vulnerability
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Adobe Acrobat and Reader Heap-based Buffer Overflow Vulnerability
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Adobe Acrobat Use-After-Free Vulnerability
CVE
Adobe Acrobat and Reader Use-After-Free Vulnerability
CVE
CVE-2023-21608
Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.