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TI-2021-04915 Aliases CVE-2021-21870GHSA-4cm9-vfcj-fcm5

Use after free in Foxit

Priority MEDIUM 42CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

A use-after-free vulnerability exists in the JavaScript engine of Foxit Software’s PDF Reader, version 10.1.4.37651. A specially crafted PDF document can trigger the reuse of previously free memory, which can lead to arbitrary code execution. An attacker needs to trick the user into opening a malicious file or site to trigger this vulnerability if the browser plugin extension is enabled.

Why it matters now

EPSS 0.01893 79th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—FoxitFoxit Reader 10.1.4.37651—No fix listedCNA
  • Foxit Vendor— Affected Foxit Reader 10.1.4.37651 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:foxit:pdf_reader:10.1.4.37651:*:*:*:*:*:*:*10.1.4.37651VulnerableFoxit
  • cpe:2.3:a:foxit:pdf_reader:10.1.4.37651:*:*:*:*:*:*:* Versions 10.1.4.37651 Vulnerable ·Foxit

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21870
  2. 2026-10-03 Alias added: GHSA-4cm9-vfcj-fcm5

References

Exploit 1

  • TI-2021-13823 Use after free in Foxit PDF Reader CVSS 3.1HIGH 7.8
  • TI-2025-23518 A memory corruption vulnerability exists in Foxit Reader 2025.1.0.27937 due to the use of… CVSS 3.1HIGH 8.8
  • TI-2024-33074 Use after free in Foxit Reader CVSS 3.1HIGH 8.8
  • TI-2024-32078 Use after free in Foxit Reader CVSS 3.1HIGH 8.8
  • TI-2024-19083 Use after free in Foxit Reader CVSS 3.1HIGH 8.8
  • TI-2024-17038 Use after free in Foxit Reader CVSS 3.1HIGH 8.8
See all 372 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences