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TI-2021-04938 Aliases CVE-2021-21893GHSA-cjvq-xvv5-f922

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 11.0.0.49893. A specially crafted PDF document can trigger the reuse of previously freed memory, which can lead to arbitrary code execution. An attacker needs to trick the user to open the malicious file to trigger this vulnerability. Exploitation is also possible if a user visits a specially crafted, malicious site 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 11.0.0.49893—No fix listedCNA
  • Foxit Vendor— Affected Foxit Reader 11.0.0.49893 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:foxit:pdf_reader:11.0.0.49893:*:*:*:*:*:*:*11.0.0.49893VulnerableFoxit
  • cpe:2.3:a:foxit:pdf_reader:11.0.0.49893:*:*:*:*:*:*:* Versions 11.0.0.49893 Vulnerable ·Foxit

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21893
  2. 2026-10-03 Alias added: GHSA-cjvq-xvv5-f922

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