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Vulnerability record · CVE-2026-36669 · published 17 July 2026

CVE-2026-36669: Unrestricted file upload vulnerability

An unauthenticated arbitrary file upload vulnerability in ck_upload_handler.php in Feng Office 3.11.13.11 allows remote attackers to upload malicious files (such as .html) to the web-accessible /tmp/ directory.

9.8 CVSS 3.1 Critical EPSS 0.66% · top 50.4% CWE-434 · Unrestricted file upload Deferred
9.8CVSS 3.1 base score
0.66%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
23 Jul 2026Last modified by NVD

Description

An unauthenticated arbitrary file upload vulnerability in ck_upload_handler.php in Feng Office 3.11.13.11 allows remote attackers to upload malicious files (such as .html) to the web-accessible /tmp/ directory.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/firstlax6t/CVE-2026-36669-FengOffice
https://www.fengoffice.com/
https://github.com/firstlax6t/CVE-2026-36669-FengOffice

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Source: NIST National Vulnerability Database (record CVE-2026-36669), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.