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TI-2026-05209 Aliases CVE-2026-5939GHSA-242w-wcg6-2fc6

UAF in Foxit PDF Editor/Reader via XFA calculate event

Priority LOW 26CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00113 1st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Foxit Software Inc.Foxit PDF Editorup to 2026.1; up to 14.0.3—No fix listedCNA
Foxit Software Inc.Foxit PDF Readerup to 2026.1—No fix listedCNA
  • Foxit PDF Editor VendorFoxit Software Inc. Affected up to 2026.1; up to 14.0.3 Fixed in — No fix listed CNA
  • Foxit PDF Reader VendorFoxit Software Inc. Affected up to 2026.1 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*14.0.0 to before 14.0.4; 2023.0.0 to before 2026.1.1VulnerableFoxit
cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:*before 2026.1.1VulnerableFoxit
  • cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:* Versions 14.0.0 to before 14.0.4; 2023.0.0 to before 2026.1.1 Vulnerable ·Foxit
  • cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:* Versions before 2026.1.1 Vulnerable ·Foxit

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5939
  2. 2026-10-03 Alias added: GHSA-242w-wcg6-2fc6

References

Advisory 1

  • TI-2011-04633 Foxit PDF Reader < 4.3.1.0218 JavaScript File Write CVSS 4.0HIGH 8.4
  • TI-2016-06851 Out-of-bounds read in Foxit Reader CVSS 3.0MEDIUM 6.8
  • TI-2018-02932 Use after free in Foxit PDF Reader CVSS 3.1HIGH 7.8
  • TI-2018-02965 Use after free in Foxit PDF Reader CVSS 3.1HIGH 8.8
  • TI-2018-02964 Use after free in Foxit PDF Reader CVSS 3.1HIGH 8.8
  • TI-2018-02962 Use after free in Foxit PDF Reader CVSS 3.1HIGH 8.8
See all 120 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences