CVE-2026-57256: CWE-416 Use after free in Foxit Software Inc. Foxit PDF Editor
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.
AI Analysis
Technical Summary
The vulnerability arises from improper validation of form objects and their internal dictionary pointers during repeated operations on list box fields triggered by JavaScript in PDFs. This leads to use-after-free conditions where the application accesses invalid or uninitialized memory, causing illegal pointer reads and crashes. The issue is classified as CWE-416 (Use After Free) and affects Foxit PDF Editor. No vendor advisory or patch information is currently available, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation can cause the Foxit PDF Editor application to crash due to illegal memory access. The CVSS vector indicates local attack vector with low complexity, no privileges required, but user interaction is necessary. The impact includes high confidentiality, integrity, and availability impacts, implying potential for serious disruption or data compromise if exploited.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should exercise caution when opening PDFs containing JavaScript, especially those from untrusted sources. Avoid interacting with list box fields in forms that may trigger this vulnerability.
CVE-2026-57256: CWE-416 Use after free in Foxit Software Inc. Foxit PDF Editor
Description
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.
CVSS v3.1
Score 7.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability arises from improper validation of form objects and their internal dictionary pointers during repeated operations on list box fields triggered by JavaScript in PDFs. This leads to use-after-free conditions where the application accesses invalid or uninitialized memory, causing illegal pointer reads and crashes. The issue is classified as CWE-416 (Use After Free) and affects Foxit PDF Editor. No vendor advisory or patch information is currently available, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation can cause the Foxit PDF Editor application to crash due to illegal memory access. The CVSS vector indicates local attack vector with low complexity, no privileges required, but user interaction is necessary. The impact includes high confidentiality, integrity, and availability impacts, implying potential for serious disruption or data compromise if exploited.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should exercise caution when opening PDFs containing JavaScript, especially those from untrusted sources. Avoid interacting with list box fields in forms that may trigger this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Foxit
- Date Reserved
- 2026-06-24T03:01:18.718Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4e27edc9d9e3dbe3eaebe6
Added to database: 07/08/2026, 10:35:25 UTC
Last enriched: 07/15/2026, 11:51:46 UTC
Last updated: 08/22/2026, 10:52:10 UTC
Views: 60
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