How can the vulnerability CVE-2021-34840 be exploited?

To exploit CVE-2021-34840, user interaction is required. The target must visit a malicious page or open a malicious file.

What is the severity of CVE-2021-34840?

CVE-2021-34840 has a severity rating of 7.8 (High).

Which software versions are affected by CVE-2021-34840?

Foxit PDF Reader versions up to and including 11.0.0.49893 are affected by CVE-2021-34840.

How can I fix the vulnerability CVE-2021-34840?

To fix CVE-2021-34840, it is recommended to update to the latest version of Foxit PDF Reader or apply any available patches or security updates.

Vulnerability/
CVE-2021-34840

high

7.8

CWE

416

4/8/2021

4/8/2024

CVE-2021-34840: Foxit PDF Reader Annotation Use-After-Free Remote Code Execution Vulnerability

Q: What is CVE-2021-34840?

CVE-2021-34840 is a vulnerability that allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893.

First published: Wed Aug 04 2021(Updated: )

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of Annotation objects. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-14021.

Credit: zdi-disclosures@trendmicro.com

Affected Software	Affected Version	How to fix
Foxit PDF Reader	<=11.0.0.49893
Foxitsoftware Pdf Editor	<=10.1.4.37651
Foxitsoftware Pdf Editor	=11.0.0.49893
Microsoft Windows

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Frequently Asked Questions

What is CVE-2021-34840?
CVE-2021-34840 is a vulnerability that allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893.
How can the vulnerability CVE-2021-34840 be exploited?
To exploit CVE-2021-34840, user interaction is required. The target must visit a malicious page or open a malicious file.
What is the severity of CVE-2021-34840?
CVE-2021-34840 has a severity rating of 7.8 (High).
Which software versions are affected by CVE-2021-34840?
Foxit PDF Reader versions up to and including 11.0.0.49893 are affected by CVE-2021-34840.
How can I fix the vulnerability CVE-2021-34840?
To fix CVE-2021-34840, it is recommended to update to the latest version of Foxit PDF Reader or apply any available patches or security updates.

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