CVE-2021-40420

A use-after-free vulnerability exists in the JavaScript engine of Foxit Software’s PDF Reader, version 11.1.0.52543. 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.

• CWE-416
• CWE-416

• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1429Exploit, Technical Description, Third Party Advisory
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1429Exploit, Technical Description, Third Party Advisory

Published

Feb 4, 2022

Last Modified

Jun 17, 2026

Status

Modified

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