CVE-2026-36669

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…

Critical · published July 17, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
50.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00660 · 50.9th percentile
Published
2026-07-17T00:00Z
EPSS history
Timeline
  • 17 JUL 00:00Z
    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…
    cvelistv5