Heap-based Out-of-Bounds Write Vulnerability in Foxit PDF Editor/Reader
CVE-2026-91811

7.8HIGH

Key Information:

Vendor

Foxit Inc.

Status
Foxit PDF Editor
Foxit
Vendor
CVE Published:
23 September 2026

What is CVE-2026-91811?

A heap-based out-of-bounds write vulnerability in Foxit PDF Editor/Reader's PRC parser can occur due to the inadequate validation of vertex indices in triangular fan texture meshes. This flaw could potentially lead to memory corruption, allowing an attacker to manipulate memory in unexpected ways, possibly leading to application crashes or even arbitrary code execution in vulnerable environments.

Affected Version(s)

Foxit PDF Editor Windows Versions 2026.2 and earlier

Foxit PDF Editor Windows Versions 14.0.7 and earlier

Foxit PDF Editor Windows Versions 13.2.6 and earlier

References

https://www.foxit.com/support/security-bulletins.html

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

kai63001 working with TrendAI Zero Day Initiative
.