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CVE-2021-21893 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1336	CVE	ExploitThird Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1336	[email protected]	ExploitThird Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-416	Use After Free	[email protected]
CWE-416	Use After Free	[email protected]

Affected Products

Product	Versions
foxit pdf reader	11.0.0.49893
CPE cpe:2.3:a:foxit:pdf_reader:11.0.0.49893:::::::* Remediation No remediation found in references.

Change History

8 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Sep 3, 2022	Modified Analysis	[email protected]
Apr 28, 2022	CVE Modified	[email protected]
Apr 19, 2022	CVE Modified	[email protected]
Feb 8, 2022	CPE Deprecation Remap	[email protected]
Aug 13, 2021	Initial Analysis	[email protected]