Common Weakness Enumeration

CWE-416

Allowed

Use After Free

Abstraction: Variant · Status: Stable

API response cwe.mitre.org

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

11895 vulnerabilities reference this CWE, most recent first.

CVE-2026-91957 (GCVE-0-2026-91957)

Vulnerability from cvelistv5 – Published: 2026-09-15 15:18 – Updated: 2026-09-17 14:56
VLAI
Title
FreeRDP before 3.31.0 Use-After-Free via smartcard worker
Summary
FreeRDP before 3.31.0 contains a use-after-free vulnerability in the smartcard RDPDR device handler when worker thread creation fails after device registration. Attackers can trigger thread creation failure during channel setup to cause device pointer deallocation while devman retains a reference, leading to crash or code execution.
Severity
2.3 (Low)
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
3.1 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 14:56 UTC
CWE
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6398 records in the last 180 days details
References
Impacted products
Vendor Product Version
FreeRDP FreeRDP Affected: 0 , < 3.31.0 (semver)
Unaffected: 3.31.0 (semver)
    cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-31 00:00
Credits
kimaiden1984-boop
Show details on NVD website
To clipboard 

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CVE-2026-91818 (GCVE-0-2026-91818)

Vulnerability from cvelistv5 – Published: 2026-09-23 07:49 – Updated: 2026-09-23 14:15
VLAI
Title
Foxit PDF Editor/Reader Annotation Use-After-Free Remote Code Execution Vulnerability
Summary
A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s JavaScript handling of PDF annotations. Reentrant page-event processing during annotation enumeration may release the associated page object, which is subsequently accessed, resulting in an application crash.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 14:15 UTC
CWE
  • CWE-416 - Use After Free (CWE-416)
Assigner
Foxit CNA under the mitre root
CNA scorecard C 70/100 over 69 records in the last 180 days details
References
Impacted products
Vendor Product Version
Foxit Software Inc. Foxit PDF Editor Affected: Versions 2026.2 and earlier
Affected: Versions 14.0.7 and earlier
Affected: Versions 13.2.6 and earlier
Create a notification for this product.
Foxit Software Inc. Foxit PDF Reader Affected: Versions 2026.2 and earlier
Create a notification for this product.
Credits
Anonymous working with TrendAI Zero Day Initiative
Show details on NVD website
To clipboard 

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CVE-2026-91816 (GCVE-0-2026-91816)

Vulnerability from cvelistv5 – Published: 2026-09-23 07:49 – Updated: 2026-09-23 14:23
VLAI
Title
Foxit PDF Editor/Reader AcroForm Use-After-Free Remote Code Execution Vulnerability
Summary
A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s handling of PDF annotations. Reentrant annotation deletion triggered by embedded JavaScript can cause the application to access an annotation object after it has been released, resulting in a use-after-free condition and application crash.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 14:22 UTC
CWE
  • CWE-416 - Use After Free (CWE-416)
Assigner
Foxit CNA under the mitre root
CNA scorecard C 70/100 over 69 records in the last 180 days details
References
Impacted products
Vendor Product Version
Foxit Software Inc. Foxit PDF Editor Affected: Versions 2026.2 and earlier
Affected: Versions 14.0.7 and earlier
Affected: Versions 13.2.6 and earlier
Create a notification for this product.
Foxit Software Inc. Foxit PDF Reader Affected: Versions 2026.2 and earlier
Create a notification for this product.
Credits
Anonymous working with TrendAI Zero Day Initiative
Show details on NVD website
To clipboard 

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CVE-2026-91809 (GCVE-0-2026-91809)

Vulnerability from cvelistv5 – Published: 2026-09-23 07:49 – Updated: 2026-09-23 15:26
VLAI
Title
Foxit PDF Editor/Reader Annotation Use-After-Free Information Disclosure Vulnerability
Summary
A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s handling of malformed PDF form fields. Improper validation during field-name traversal may cause the application to access a released object, resulting in an application crash.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 15:26 UTC
CWE
  • CWE-416 - Use After Free (CWE-416)
Assigner
Foxit CNA under the mitre root
CNA scorecard C 70/100 over 69 records in the last 180 days details
References
Impacted products
Vendor Product Version
Foxit Software Inc. Foxit PDF Editor Affected: Versions 2026.2 and earlier
Affected: Versions 14.0.7 and earlier
Affected: Versions 13.2.6 and earlier
Create a notification for this product.
Foxit Software Inc. Foxit PDF Reader Affected: Versions 2026.2 and earlier
Create a notification for this product.
Credits
Anonymous working with TrendAI Zero Day Initiative
Show details on NVD website
To clipboard 

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CVE-2026-91806 (GCVE-0-2026-91806)

Vulnerability from cvelistv5 – Published: 2026-09-23 07:50 – Updated: 2026-09-23 14:41
VLAI
Title
Foxit PDF Editor/Reader Doc Object Use-After-Free Information Disclosure Vulnerability
Summary
A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s handling of PDF form fields. Embedded JavaScript may access form-field references after the corresponding fields have been released, resulting in an application crash.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 14:41 UTC
CWE
  • CWE-416 - Use After Free (CWE-416)
Assigner
Foxit CNA under the mitre root
CNA scorecard C 70/100 over 69 records in the last 180 days details
References
Impacted products
Vendor Product Version
Foxit Software Inc. Foxit PDF Editor Affected: Versions 2026.2 and earlier
Affected: Versions 14.0.7 and earlier
Affected: Versions 13.2.6 and earlier
Create a notification for this product.
Foxit Software Inc. Foxit PDF Reader Affected: Versions 2026.2 and earlier
Create a notification for this product.
Credits
Anonymous working with TrendAI Zero Day Initiative
Show details on NVD website
To clipboard 

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CVE-2026-91805 (GCVE-0-2026-91805)

Vulnerability from cvelistv5 – Published: 2026-09-23 07:50 – Updated: 2026-09-23 14:45
VLAI
Title
Use-after-free Vulnerability in Foxit PDF Editor/Reader Page-tree Handling
Summary
A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s PDF page-tree handling. A specially crafted PDF can trigger page-structure changes during rendering, causing the application to access released page objects and resulting in memory corruption and an application crash.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 14:45 UTC
CWE
  • CWE-416 - Use After Free (CWE-416)
Assigner
Foxit CNA under the mitre root
CNA scorecard C 70/100 over 69 records in the last 180 days details
References
Impacted products
Vendor Product Version
Foxit Software Inc. Foxit PDF Editor Affected: Versions 2026.2 and earlier
Affected: Versions 14.0.7 and earlier
Affected: Versions 13.2.6 and earlier
Create a notification for this product.
Foxit Software Inc. Foxit PDF Reader Affected: Versions 2026.2 and earlier
Create a notification for this product.
Credits
Xupeng
Show details on NVD website
To clipboard 

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CVE-2026-91799 (GCVE-0-2026-91799)

Vulnerability from cvelistv5 – Published: 2026-09-23 07:50 – Updated: 2026-09-23 14:42
VLAI
Title
Foxit Editor/Reader Array resetForm Use-After-Free Vulnerability
Summary
A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s handling of JavaScript array objects. A specially crafted PDF may cause the application to access a released object during array processing, potentially resulting in application crashes or arbitrary code execution.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 14:42 UTC
CWE
Assigner
Foxit CNA under the mitre root
CNA scorecard C 70/100 over 69 records in the last 180 days details
References
Impacted products
Vendor Product Version
Foxit Software Inc. Foxit PDF Editor Affected: Versions 2026.2 and earlier
Affected: Versions 14.0.7 and earlier
Affected: Versions 13.2.6 and earlier
Create a notification for this product.
Foxit Software Inc. Foxit PDF Reader Affected: Versions 2026.2 and earlier
Create a notification for this product.
Credits
KPC of Cisco Talos
Show details on NVD website
To clipboard 

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CVE-2026-91793 (GCVE-0-2026-91793)

Vulnerability from cvelistv5 – Published: 2026-09-23 07:51 – Updated: 2026-09-23 14:46
VLAI
Title
Foxit PDF Editor/Reader Doc Object Use-After-Free Information Disclosure Vulnerability
Summary
When opening a specially crafted PDF, Foxit PDF Editor/Reader executes scripts that modify annotation rich-text attributes containing malformed font data. During subsequent annotation appearance reconstruction, it accesses an object after it has been released, resulting in a use-after-free condition and an application crash.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 14:46 UTC
CWE
Assigner
Foxit CNA under the mitre root
CNA scorecard C 70/100 over 69 records in the last 180 days details
References
Impacted products
Vendor Product Version
Foxit Software Inc. Foxit PDF Editor Affected: Versions 2026.2 and earlier
Affected: Versions 14.0.7 and earlier
Affected: Versions 13.2.6 and earlier
Create a notification for this product.
Foxit Software Inc. Foxit PDF Reader Affected: Versions 2026.2 and earlier
Create a notification for this product.
Credits
Anonymous working with TrendAI Zero Day Initiative
Show details on NVD website
To clipboard 

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CVE-2026-91792 (GCVE-0-2026-91792)

Vulnerability from cvelistv5 – Published: 2026-09-23 07:51 – Updated: 2026-09-23 14:47
VLAI
Title
Foxit PDF Editor/Reader Annotation Use-After-Free Remote Code Execution Vulnerability
Summary
When processing a specially crafted PDF, Foxit PDF Editor/Reader may perform reentrant zoom and layout operations through page- and annotation-related JavaScript actions. This can cause the application to access page objects after they have been released, resulting in a use-after-free condition and an application crash.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 14:47 UTC
CWE
Assigner
Foxit CNA under the mitre root
CNA scorecard C 70/100 over 69 records in the last 180 days details
References
Impacted products
Vendor Product Version
Foxit Software Inc. Foxit PDF Editor Affected: Versions 2026.2 and earlier
Affected: Versions 14.0.7 and earlier
Affected: Versions 13.2.6 and earlier
Create a notification for this product.
Foxit Software Inc. Foxit PDF Reader Affected: Versions 2026.2 and earlier
Create a notification for this product.
Credits
Anonymous working with TrendAI Zero Day Initiative
Show details on NVD website
To clipboard 

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CVE-2026-91791 (GCVE-0-2026-91791)

Vulnerability from cvelistv5 – Published: 2026-09-23 07:51 – Updated: 2026-09-23 14:47
VLAI
Title
Foxit PDF Editor/Reader Annotation Use-After-Free Remote Code Execution Vulnerability
Summary
When processing a specially crafted PDF file, Foxit PDF Editor/Reader may encounter a reentrant execution condition involving JavaScript triggered by page-visibility events. This can cause the application to access a released page-view object while calculating annotation boundaries, resulting in an invalid memory read and application crash.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 14:47 UTC
CWE
Assigner
Foxit CNA under the mitre root
CNA scorecard C 70/100 over 69 records in the last 180 days details
References
Impacted products
Vendor Product Version
Foxit Software Inc. Foxit PDF Editor Affected: Versions 2026.2 and earlier
Affected: Versions 14.0.7 and earlier
Affected: Versions 13.2.6 and earlier
Create a notification for this product.
Foxit Software Inc. Foxit PDF Reader Affected: Versions 2026.2 and earlier
Create a notification for this product.
Credits
Anonymous working with TrendAI Zero Day Initiative
Show details on NVD website
To clipboard 

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Mitigation
Architecture and Design

Strategy: Language Selection

Choose a language that provides automatic memory management.

Mitigation
Implementation

Strategy: Attack Surface Reduction

When freeing pointers, be sure to set them to NULL once they are freed. However, the utilization of multiple or complex data structures may lower the usefulness of this strategy.

No CAPEC attack patterns related to this CWE.

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