#VU103498 Heap-based buffer overflow in PDF-XChange products - CVE-2025-0903

Vulnerability identifier: #VU103498

Vulnerability risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2025-0903

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PDF-XChange Editor
Client/Desktop applications / Office applications
PDF-XChange PRO
Client/Desktop applications / Office applications
PDF-Tools
Client/Desktop applications / Office applications

Vendor: PDF-XChange

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the parsing of RTF files. A remote attacker can trick a victim to open a specially crafted file, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

PDF-XChange Editor: 10.4.0.388

PDF-XChange PRO: 10.4.0.388

PDF-Tools: 10.4.0.388

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External links
https://www.zerodayinitiative.com/advisories/ZDI-25-070/
https://www.pdf-xchange.com/support/security-bulletins.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.