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CVE-2023-39501: PDF-XChange Editor OXPS File Parsing Untrusted Pointer Dereference Remote Code Execution Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-03 · updated 2026-06-17
• Weakness: CWE-822

Description

PDF-XChange Editor OXPS File Parsing Untrusted Pointer Dereference 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 OXPS files. The issue results from the lack of proper validation of a user-supplied value prior to dereferencing it as a pointer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-20034.

Affected products

• PDF-XChange Pdf-Tools: 9.5.366.0
• PDF-XChange Editor: 9.5.366.0

References

• https://www.zerodayinitiative.com/advisories/ZDI-23-1135/
• https://www.zerodayinitiative.com/advisories/ZDI-23-1135/

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