Vulnerability · Published Aug 26, 2026 · Assigned by twcert
CVE-2026-80233CAYIN Technology｜CAYIN CMS-WS/CMS-SE/SMP - Arbitrary File Upload
High 7.2
In plain English
A high-severity unrestricted file upload in CAYIN CMS-SE from CAYIN Technology. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).
Severity (CVSS 3.1)7.2High
Exploit odds (30 days)0.8%top 42.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| CAYIN Technology | CAYIN CMS-WS | 0 – through 1.0.25336 |
| CAYIN Technology | CAYIN CMS-SE | 0 – through 11.0.25336 |
| CAYIN Technology | CAYIN SMP | 0 – through 4.0.25336 |
Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
References
- https://www.twcert.org.tw/tw/cp-132-11129-4a040-1.html third-party-advisory
- https://www.twcert.org.tw/en/cp-139-11135-189f7-2.html third-party-advisory