What is the severity of CVE-2021-34833?

The severity of CVE-2021-34833 is high with a CVSS score of 7.8.

How does CVE-2021-34833 allow remote code execution?

CVE-2021-34833 allows remote code execution by exploiting a use-after-free vulnerability in Foxit PDF Reader.

What software versions are affected by CVE-2021-34833?

Foxit PDF Reader 11.0.0.49893 and Foxitsoftware Pdf Editor 10.1.4.37651 are affected by CVE-2021-34833.

What is the recommended action to protect against CVE-2021-34833?

Update Foxit PDF Reader to the latest version available and exercise caution when visiting unknown websites or opening suspicious files.

Where can I find more information about CVE-2021-34833?

You can find more information about CVE-2021-34833 in the security bulletins provided by Foxit and the advisory from Zero Day Initiative.

Vulnerability/
CVE-2021-34833

high

7.8

CWE

416

4/8/2021

8/2/2022

21/10/2023

CVE-2021-34833: Foxit PDF Reader Annotation Use-After-Free Remote Code Execution Vulnerability

First published: Wed Aug 04 2021(Updated: )

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader. 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.

Credit: zdi-disclosures@trendmicro.com

Affected Software	Affected Version	How to fix
Foxit PDF Reader
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 the severity of CVE-2021-34833?
The severity of CVE-2021-34833 is high with a CVSS score of 7.8.
How does CVE-2021-34833 allow remote code execution?
CVE-2021-34833 allows remote code execution by exploiting a use-after-free vulnerability in Foxit PDF Reader.
What software versions are affected by CVE-2021-34833?
Foxit PDF Reader 11.0.0.49893 and Foxitsoftware Pdf Editor 10.1.4.37651 are affected by CVE-2021-34833.
What is the recommended action to protect against CVE-2021-34833?
Update Foxit PDF Reader to the latest version available and exercise caution when visiting unknown websites or opening suspicious files.
Where can I find more information about CVE-2021-34833?
You can find more information about CVE-2021-34833 in the security bulletins provided by Foxit and the advisory from Zero Day Initiative.

collector/zdi-advisory
alias/ZDI-21-915
alias/ZDI-CAN-14023
alias/CVE-2021-34833
collector/nvd-index
vendor/foxit
canonical/foxit pdf reader
version/foxit pdf reader/11.0.0.49893
vendor/foxitsoftware
canonical/foxitsoftware pdf editor
version/foxitsoftware pdf editor/10.1.4.37651
version/foxitsoftware pdf editor/11.0.0.49893
vendor/microsoft
canonical/microsoft windows

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