CVE-2025-6660: PDF-Xchange PDF-Tools

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

PDF-XChange Editor GIF File Parsing Heap-based Buffer Overflow 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 GIF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26763.

Affected products

• PDF-Xchange PDF-Tools: version 10.5.2.395 only
• PDF-Xchange PDF-Xchange Editor: version 10.5.2.395 only
• PDF-Xchange PDF-Xchange Pro: version 10.5.2.395 only

Published 2025-06-25. Last modified 2026-06-17.