CVE-2026-5943: Foxit PDF Editor/Reader AcroForm Annotation Use-After-Free Remote Code Execution Vulnerability

Q: What is the severity of CVE-2026-5943?

CVE-2026-5943 is rated as a critical vulnerability due to its potential for remote code execution.

Q: How do I fix CVE-2026-5943?

To fix CVE-2026-5943, users should update to the latest version of Foxit PDF Editor or Foxit Reader that addresses this vulnerability.

Q: What type of vulnerability is CVE-2026-5943?

CVE-2026-5943 is a use-after-free vulnerability affecting Foxit PDF software.

Q: Who is affected by CVE-2026-5943?

Users of Foxit PDF Editor and Foxit Reader are affected by CVE-2026-5943.

Q: What are the potential consequences of CVE-2026-5943?

The potential consequences of CVE-2026-5943 include unauthorized remote code execution, which could lead to full system compromise.

Published Apr 27, 2026

Updated

Document structural anomalies caused inconsistencies between page element relationships and internal index states. When scripts triggered document modifications, object reference validity was not properly maintained, leading to a crash when accessing an invalid pointer during page information queries.

Affected Software

6 affected components

Foxit Foxit PDF Editor

Foxit Foxit Reader

Foxit PDF Editor<13.2.4

Foxit PDF Editor>=14.0.0<14.0.4

Foxit PDF Editor>=2023.0.0<2026.1.1

Foxit PDF Reader<2026.1.1

Event History

Apr 27, 2026

CVE Published

via MITRE·11:00 AM

Data Sourced

via MITRE·11:00 AM

DescriptionSeverityWeakness

Data Sourced

via NVD·12:16 PM

DescriptionSeverityWeaknessAffected Software

Oct 6, 58306

Event

via FIRST·01:45 PM

Frequently Asked Questions

What is the severity of CVE-2026-5943?

CVE-2026-5943 is rated as a critical vulnerability due to its potential for remote code execution.

How do I fix CVE-2026-5943?

To fix CVE-2026-5943, users should update to the latest version of Foxit PDF Editor or Foxit Reader that addresses this vulnerability.

What type of vulnerability is CVE-2026-5943?

CVE-2026-5943 is a use-after-free vulnerability affecting Foxit PDF software.

Who is affected by CVE-2026-5943?

Users of Foxit PDF Editor and Foxit Reader are affected by CVE-2026-5943.

What are the potential consequences of CVE-2026-5943?

The potential consequences of CVE-2026-5943 include unauthorized remote code execution, which could lead to full system compromise.

Company

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Contact

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