CVE-2026-57256 pdf editor vulnerability
When the application opens a PDF and executes JavaScript, it performs abnormal operations on the list box field, and this operation is repeated after the form is reset. During this process, the application failed to adequately verify the validity of the form objects and their internal dictionary pointers, resulting in accessing internal members of invalid or improperly initialized fields. This led to an illegal pointer read, ultimately causing the application to crash.
Quick answer
foxit pdf editor should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- -
Fixed versions
- Apply the latest vendor-supported patched version.
How to fix it
CVE-2026-57256 affects Foxit PDF Editor when a user opens crafted PDF, XDP, JavaScript, PRC, Unity 3D, or related document content described in the Foxit bulletin. In this case, crafted PDF JavaScript can trigger use-after-free behavior with potential arbitrary code execution, so priority should be highest for users who regularly open untrusted attachments or documents from external sources. Foxit published security updates for affected Windows and macOS PDF Editor branches, including Foxit PDF Editor 13.2.5 for Windows and the corresponding July 2026 macOS updates. Update affected endpoints to the latest Foxit-supported patched release and use document-handling restrictions until endpoint deployment is complete.
- Inventory endpoints, virtual desktops, and packaged application images that include Foxit PDF Editor or Foxit PhantomPDF.
- Identify whether installed Foxit PDF Editor versions are affected by CVE-2026-57256, including Windows 13.2.4.24048 and earlier or the affected macOS branches listed by Foxit.
- Update Foxit PDF Editor through enterprise software deployment, the in-app update flow, or the official Foxit download to the latest patched release.
- Restrict opening untrusted PDFs, XDP files, embedded 3D content, and PDF JavaScript until the updated version is deployed.
- Apply endpoint controls such as attachment sandboxing, email filtering, browser download warnings, and least-privilege user profiles.
- Review EDR, crash reports, recent document-open events, and helpdesk tickets for suspicious PDF crashes or unexpected child processes.
- Reimage affected endpoints or rotate user credentials if a suspicious document was opened and endpoint telemetry suggests exploitation.
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Verify the fix
- Confirm managed endpoints report the patched Foxit PDF Editor version through inventory or endpoint management tooling.
- Confirm users can no longer launch the vulnerable Foxit build from side-by-side installs, stale virtual images, or unmanaged paths.
- Open a benign PDF test set and confirm normal business workflows work after the update.
- Review EDR and crash telemetry after rollout for repeated Foxit faults or suspicious document-triggered process activity.
- Document deployment coverage, exception owners, and any endpoint investigation evidence.
Related categories
Trusted references
FAQ
What is affected by CVE-2026-57256?
foxit pdf editor versions listed as affected should be reviewed: -.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
How are Fixnx security risk categories chosen?
Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.