CVE-2026-3777
Received Received - Intake
Use-After-Free in View Cache Pointers Enables Code Execution

Publication date: 2026-04-01

Last updated on: 2026-04-14

Assigner: Foxit

Description
The application does not properly validate the lifetime and validity of internal view cache pointers after JavaScript changes the document zoom and page state. When a script modifies the zoom property and then triggers a page change, the original view object may be destroyed while stale pointers are still kept and later dereferenced, which under crafted JavaScript and document structures can lead to a use-after-free condition and potentially allow arbitrary code execution.
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Meta Information
Published
2026-04-01
Last Modified
2026-04-14
Generated
2026-06-16
AI Q&A
2026-04-01
EPSS Evaluated
2026-06-14
NVD
CVE-2026-3777
EUVD
EUVD-2026-17755
Affected Vendors & Products
Showing 12 associated CPEs
Vendor Product Version / Range
foxit pdf_editor From 2023.1.0.15510 (inc) to 2023.3.0.23028 (inc)
foxit pdf_editor From 2024.1.0.23997 (inc) to 2024.4.1.27687 (inc)
foxit pdf_editor to 13.2.2.24014 (inc)
foxit pdf_editor From 14.0.0.33046 (inc) to 14.0.2.33402 (inc)
foxit pdf_editor From 2025.1.0.27937 (inc) to 2025.3.0.35737 (inc)
foxit pdf_reader to 2025.3.0.35737 (inc)
foxit pdf_editor From 2023.1.0.55583 (inc) to 2023.3.0.63083 (inc)
foxit pdf_editor From 2024.1.0.63682 (inc) to 2024.4.1.66479 (inc)
foxit pdf_editor to 13.2.2.63349 (inc)
foxit pdf_editor From 14.0.0.68868 (inc) to 14.0.2.69164 (inc)
foxit pdf_editor From 2025.1.0.66692 (inc) to 2025.3.0.69570 (inc)
foxit pdf_reader to 2025.3.0.69570 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
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Executive Summary

This vulnerability occurs because the application does not properly validate the lifetime and validity of internal view cache pointers after JavaScript changes the document zoom and page state.

When a script modifies the zoom property and then triggers a page change, the original view object may be destroyed while stale pointers to it are still kept and later dereferenced.

Under certain crafted JavaScript and document structures, this can lead to a use-after-free condition, which potentially allows an attacker to execute arbitrary code.

Impact Analysis

This vulnerability can impact you by allowing an attacker to execute arbitrary code on your system.

Because it involves a use-after-free condition triggered by manipulated JavaScript and document states, it could lead to system compromise or unauthorized actions.

The CVSS score indicates a moderate severity with a base score of 5.5 and an impact primarily on availability.

Mitigation Strategies

To mitigate this vulnerability, users are advised to update their Foxit PDF Reader and Editor applications to the latest versions.

  • Use the application’s built-in update feature to obtain the latest version.
  • Alternatively, download the latest versions directly from the Foxit website.
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