What is CVE-2026-5939?

CVE-2026-5939 is a medium-severity vulnerability in Foxit Pdf_editor, classified under Use After Free. CVSS score: 5.5/10. Published 2026-04-27.

How severe is CVE-2026-5939?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Use After Free in Foxit Pdf_editor

CVE-2026-5939

A crafted XFA PDF can trigger a use-after-free condition during calculate event processing, causing the application to crash and resulting in an arbitrary code execution.

Vulnerability class: Use-After-Free

EPSS: 0.000 (4.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Foxit Pdf_editor
Foxit Pdf_reader
Foxit Software Inc. Pdf Editor — versions Versions 2026.1 and earlier, Versions 14.0.3 and earlier
Foxit Software Inc. Pdf Reader — versions Versions 2026.1 and earlier

Weakness classification (CWE)

CWE-416 — Use After Free

References

14984358-7092-470d-8f34-ade47a7658a2 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-5939?: CVE-2026-5939 is a medium-severity vulnerability in Foxit Pdf_editor, classified under Use After Free. CVSS score: 5.5/10. Published 2026-04-27.
How severe is CVE-2026-5939?: Medium severity. CVSS v3 base score is 5.5 out of 10.