Directory Traversal Vulnerability in Foxit PDF Editor/Reader
CVE-2026-91797

7.8HIGH

Key Information:

Vendor

Foxit Inc.

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

What is CVE-2026-91797?

The vulnerability in Foxit PDF Editor and Reader occurs due to insufficient validation of the directory traversal path in attachment file names. As a result, it enables attackers to exploit this flaw, allowing malicious attachments to be written to directories outside of the designated secure area when the PDF is opened. This can lead to unauthorized access and potential compromise of sensitive information. Users are advised to apply patches and follow best security practices to mitigate the risk.

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

Landon Peng (lunbun) of Lunbun LLC working with TrendAI Zero Day Initiative
.