CVE-2025-6642: pdf-xchange pdf-tools Out-of-bounds Read

Vulnerability summary

CVE-2025-6642 is a high (CVSS 7.8) Out-of-bounds Read vulnerability in pdf-xchange pdf-tools. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 17.9% of scored vulnerabilities.

Timeline

1. 25-06-2025
   PublishedVulnerability first disclosed.
2. 26-06-2025
   Last modifiedVulnerability information updated.

Description

PDF-XChange Editor U3D File Parsing Out-Of-Bounds Read 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 proper validation of user-supplied data, which can result in a read past the end of an allocated object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26530.

• CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.