CVE-2026-3777: CWE-416 Use after free in Foxit Software Inc. Foxit PDF Editor
CVE-2026-3777 is a use-after-free vulnerability in Foxit PDF Editor affecting versions 2025. 3 and earlier, 14. 0. 2 and earlier, and 13. 2. 2 and earlier. The issue arises when JavaScript modifies the document zoom and triggers a page change, causing stale internal view cache pointers to be dereferenced after the original view object is destroyed. This can potentially lead to arbitrary code execution. The vulnerability has a medium severity with a CVSS score of 5. 5.
AI Analysis
Technical Summary
Foxit PDF Editor improperly validates the lifetime and validity of internal view cache pointers after JavaScript changes the document zoom and page state. Specifically, when a script modifies the zoom property and triggers a page change, the original view object may be destroyed while stale pointers remain and are later dereferenced. This use-after-free condition (CWE-416) can be triggered under crafted JavaScript and document structures, potentially allowing arbitrary code execution. The vulnerability affects multiple versions of Foxit PDF Editor up to 2025.3, 14.0.2, and 13.2.2. The CVSS 3.1 base score is 5.5, indicating medium severity with local attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, and impact limited to availability.
Potential Impact
The vulnerability can lead to a use-after-free condition that may allow an attacker to execute arbitrary code on the affected system. However, the attack requires local access and user interaction, and the impact is limited to availability disruption or potential code execution. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official patch or fix information is currently available. Until a fix is released, users should exercise caution when opening untrusted PDF documents containing JavaScript and avoid interacting with suspicious content that modifies zoom and page state.
CVE-2026-3777: CWE-416 Use after free in Foxit Software Inc. Foxit PDF Editor
Description
CVE-2026-3777 is a use-after-free vulnerability in Foxit PDF Editor affecting versions 2025. 3 and earlier, 14. 0. 2 and earlier, and 13. 2. 2 and earlier. The issue arises when JavaScript modifies the document zoom and triggers a page change, causing stale internal view cache pointers to be dereferenced after the original view object is destroyed. This can potentially lead to arbitrary code execution. The vulnerability has a medium severity with a CVSS score of 5. 5.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Foxit PDF Editor improperly validates the lifetime and validity of internal view cache pointers after JavaScript changes the document zoom and page state. Specifically, when a script modifies the zoom property and triggers a page change, the original view object may be destroyed while stale pointers remain and are later dereferenced. This use-after-free condition (CWE-416) can be triggered under crafted JavaScript and document structures, potentially allowing arbitrary code execution. The vulnerability affects multiple versions of Foxit PDF Editor up to 2025.3, 14.0.2, and 13.2.2. The CVSS 3.1 base score is 5.5, indicating medium severity with local attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, and impact limited to availability.
Potential Impact
The vulnerability can lead to a use-after-free condition that may allow an attacker to execute arbitrary code on the affected system. However, the attack requires local access and user interaction, and the impact is limited to availability disruption or potential code execution. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official patch or fix information is currently available. Until a fix is released, users should exercise caution when opening untrusted PDF documents containing JavaScript and avoid interacting with suspicious content that modifies zoom and page state.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Foxit
- Date Reserved
- 2026-03-08T03:43:24.941Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69cc7a8ee6bfc5ba1d85411a
Added to database: 4/1/2026, 1:53:18 AM
Last enriched: 4/8/2026, 6:39:04 AM
Last updated: 5/16/2026, 8:01:50 AM
Views: 48
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