CVE-2021-40420

HIGH

Foxit Software's PDF Reader <11.1.0.52543 - Use After Free

Title source: llm
STIX 2.1

Description

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.

References (1)

Core 1
Core References
Exploit, Technical Description, Third Party Advisory x_refsource_misc
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1429

Scores

CVSS v3 8.8
EPSS 0.0060
EPSS Percentile 69.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-416
Status published
Products (1)
foxit/pdf_reader 11.1.0.52543
Published Feb 04, 2022
Tracked Since Feb 18, 2026