What is the severity of CVE-2021-21893?

CVE-2021-21893 is considered a critical vulnerability due to its potential to allow arbitrary code execution.

How do I fix CVE-2021-21893?

To fix CVE-2021-21893, update Foxit PDF Reader to the latest version that addresses this vulnerability.

What types of attacks can result from CVE-2021-21893?

CVE-2021-21893 can allow attackers to execute arbitrary code on the victim's machine through specially crafted PDF files.

Which versions of Foxit PDF Reader are affected by CVE-2021-21893?

CVE-2021-21893 affects Foxit PDF Reader version 11.0.0.49893.

What is a use-after-free vulnerability as seen in CVE-2021-21893?

A use-after-free vulnerability, like CVE-2021-21893, is a type of programming flaw that occurs when a program continues to use a pointer after the memory it points to has been freed.

Vulnerability/
CVE-2021-21893

high

8.8

CWE

416

5/8/2021

3/8/2024

CVE-2021-21893: Use After Free

First published: Thu Aug 05 2021(Updated: )

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.

Credit: talos-cna@cisco.com

Affected Software	Affected Version	How to fix
Foxit Reader	=11.0.0.49893

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Reference Links

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1336

Frequently Asked Questions

What is the severity of CVE-2021-21893?
CVE-2021-21893 is considered a critical vulnerability due to its potential to allow arbitrary code execution.
How do I fix CVE-2021-21893?
To fix CVE-2021-21893, update Foxit PDF Reader to the latest version that addresses this vulnerability.
What types of attacks can result from CVE-2021-21893?
CVE-2021-21893 can allow attackers to execute arbitrary code on the victim's machine through specially crafted PDF files.
Which versions of Foxit PDF Reader are affected by CVE-2021-21893?
CVE-2021-21893 affects Foxit PDF Reader version 11.0.0.49893.
What is a use-after-free vulnerability as seen in CVE-2021-21893?
A use-after-free vulnerability, like CVE-2021-21893, is a type of programming flaw that occurs when a program continues to use a pointer after the memory it points to has been freed.

agent/type
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/references
agent/severity
agent/last-modified-date
agent/author
agent/weakness
agent/description
agent/first-publish-date
agent/event
agent/source
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/foxit
canonical/foxit reader
version/foxit reader/11.0.0.49893

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