Use-After-Free Vulnerability in Foxit PDF Reader
CVE-2026-5939

5.5MEDIUM

Key Information:

Vendor

Foxit Inc.

Status
Foxit PDF Editor
Foxit
Vendor
CVE Published:
27 April 2026

What is CVE-2026-5939?

A crafted XFA PDF can lead to a use-after-free condition during the processing of calculate events within Foxit PDF Reader. This vulnerability can result in the application crashing, potentially allowing attackers to execute arbitrary code on the victim's system.

Affected Version(s)

Foxit PDF Editor Windows Versions 2026.1 and earlier

Foxit PDF Editor Windows Versions 14.0.3 and earlier

Foxit PDF Reader Windows Versions 2026.1 and earlier

References

https://www.foxit.com/support/security-bulletins.html

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Haein Lee from KAIST Hacking Lab
.