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CVE-2026-5939

UAF in Foxit PDF Editor/Reader via XFA calculate event

MEDIUM
5.5
CVSS Score
Published: April 27, 2026 at 11:00 AM UTC
Updated: October 26, 2026 at 09:10 PM UTC
2 products affected across 1 vendorPDF ReaderPDF Editor

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

PDF Editor· Foxitsoftware
95%
14.0.0 ≤ v < 14.0.42023.0.0 ≤ v < 2026.1.1
PDF Reader· Foxitsoftware
95%
v < 2026.1.1

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://www.foxit.com/support/security-bulletins.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMFoxit
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-416

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