CVE-2026-80233CWE-434unrestricted-file-upload

CVE-2026-80233

High · published August 26, 2026

CVSS v3.1
7.2
EPSS
1%
Percentile
56.8
In the wild
Unconfirmed
What it is

CAYIN CMS-WS, CMS-SE, and SMP series products developed by CAYIN Technology have an Arbitrary File Upload vulnerability. Privileged remote attackers can upload and execute web shells backdoors, thereby enabling arbitrary code execution on the server.

The record
Technical detail
CVSS v3.1
7.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
8.6 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00820 · 56.8th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-08-26T13:16Z
References (2)
https://www.twcert.org.tw/en/cp-139-11135-189f7-2.html · [email protected]https://www.twcert.org.tw/tw/cp-132-11129-4a040-1.html · [email protected]
EPSS history
Timeline
  • 27 AUG 06:47Z
    EPSS moved — → 1%
    epss
  • 26 AUG 08:19Z
    CAYIN Technology｜CAYIN CMS-WS/CMS-SE/SMP - Arbitrary File Upload
    cvelistv5