--- title: "CVE-2026-91797: Foxit PDF Editor/Reader - Path Traversal" description: "Foxit PDF Editor/Reader contains a path traversal vulnerability caused by improper validation of attachment file names, letting attackers write malicious attachments outside the secure directory when the PDF is opened, exploit requires user to open the PDF." url: https://panop.io/threat-heartbeat/CVE-2026-91797/ --- # CVE-2026-91797 Foxit PDF Editor/Reader - Path Traversal Foxit PDF Editor/Reader contains a path traversal vulnerability caused by improper validation of attachment file names, letting attackers write malicious attachments outside the secure directory when the PDF is opened, exploit requires user to open the PDF. CVSS base score 7.8 /10 High CISA KEV Not listed Public exploit None known Authentication Not required EPSS 0.21% chance of exploitation in 30 days [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-91797) ## Details Type Path Traversal Impact File System Write CVSS vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Published 23 September 2026 Updated 15 October 2026 Weakness [CWE-73](https://cwe.mitre.org/data/definitions/73.html) ## Vendor fix Update to the latest version of Foxit PDF Editor/Reader. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-91797](https://nvd.nist.gov/vuln/detail/CVE-2026-91797) - [https://www.foxit.com/support/security-bulletins.html](https://www.foxit.com/support/security-bulletins.html) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)