Use-After-Free Vulnerability in Foxit PDF Editor/Reader Due to Malformed Font Data
CVE-2026-91793

7.8HIGH

Key Information:

Vendor

Foxit Inc.

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

What is CVE-2026-91793?

A vulnerability in Foxit PDF Editor/Reader allows attackers to execute scripts through specially crafted PDF files. This leads to the modification of annotation rich-text attributes with malformed font data. Subsequently, during the reconstruction of annotation appearances, the application encounters a use-after-free condition, which may result in an unexpected application crash, potentially exposing users to further risks.

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

Anonymous working with TrendAI Zero Day Initiative
.