PDF-XChange Editor 10.5.2.395 U3D File Parser use after free

Summaryinfo

A vulnerability classified as critical was found in PDF-XChange Editor 10.5.2.395. Affected by this issue is some unknown functionality of the component U3D File Parser. The manipulation results in use after free. This vulnerability was named CVE-2025-6640. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in PDF-XChange Editor 10.5.2.395. It has been classified as critical. Affected is an unknown function of the component U3D File Parser. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

PDF-XChange Editor U3D File Parsing Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. 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 parsing of U3D files. 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-26527.

The advisory is shared for download at zerodayinitiative.com. This vulnerability is traded as CVE-2025-6640 since 06/25/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/02/2025).

The vulnerability scanner Nessus provides a plugin with the ID 240861 (PDF-XChange Editor < 10.6.0.396 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (240861) and EUVD (EUVD-2025-19142). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Document Reader Software

Vendor

• PDF-XChange

Name

• Editor

Version

• 10.5.2.395

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Once again VulDB remains the best source for vulnerability data.

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