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High severity8.8NVD Advisory· Published Aug 5, 2021· Updated Jun 17, 2026

CVE-2021-21870

CVE-2021-21870

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

3
  • Foxit Software/PDF Readerdescription
  • Foxitsoftware/PDF Readerllm-fuzzy2 versions
    10.1.4.37651+ 1 more
    • (no CPE)range: 10.1.4.37651
    • cpe:2.3:a:foxit:pdf_reader:10.1.4.37651:*:*:*:*:*:*:*

Patches

Vulnerability mechanics

References

1

News mentions

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