CVE-2026-57256 Foxit Software Inc. CVE debrief

Who should care

Users of Foxit software should review and apply security updates to prevent potential crashes due to illegal pointer reads when opening and executing JavaScript in PDFs. This vulnerability may impact organizations using Foxit software for PDF management, particularly those with high security requirements.

Technical summary

The application failed to verify the validity of form objects and their internal dictionary pointers when executing JavaScript in PDFs, leading to an illegal pointer read and application crash. This issue arises from inadequate verification of form objects and dictionary pointers during JavaScript execution, impacting Foxit software users. The vulnerability is triggered when the application opens a PDF and executes JavaScript, performing abnormal operations on the list box field, which is repeated after the form is reset. Users of Foxit software should be aware of this issue and review security updates to prevent potential crashes due to illegal pointer reads.

Defensive priority

Apply security updates from the vendor to prevent potential crashes and review compensating controls for exposed systems.

Recommended defensive actions

• Review and apply security updates from Foxit
• Inventory checks for affected software versions
• Monitor for suspicious PDF files and JavaScript execution
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

Evidence is limited; verify affected scope and vendor remediation. Limited source detail exists for validation. Defenders should verify PDF handling and JavaScript execution in Foxit software. Additional review of application crash details and potential impact on managed environments is necessary.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.