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.

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0062.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
CAYIN Technology CAYIN CMS-WS unaffected
Version Status Constraints
0 affected ≤ 1.0.25336
CAYIN Technology CAYIN CMS-SE unaffected
Version Status Constraints
0 affected ≤ 11.0.25336
CAYIN Technology CAYIN SMP unaffected
Version Status Constraints
0 affected ≤ 4.0.25336

No data.

No data.

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No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

Update CMS-WS to version 1.0.26198 or later Update CMS-SE to version 11.0.26198 or later Update SMP to version 4.0.26198 or later

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.twcert.org.tw/en/cp-139-11135-189f7-2.html cve-icon
https://www.twcert.org.tw/tw/cp-132-11129-4a040-1.html cve-icon
History

Wed, 26 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 26 Aug 2026 08:30:00 +0000

Type Values Removed Values Added
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.
Title CAYIN Technology｜CAYIN CMS-WS/CMS-SE/SMP - Arbitrary File Upload
Weaknesses CWE-434
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: twcert

Published:

Updated: 2026-08-26T13:58:21.259Z

Reserved: 2026-08-26T05:58:48.754Z

Link: CVE-2026-80233

cve-icon Vulnrichment

Updated: 2026-08-26T13:58:17.124Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T10:00:04Z

Weaknesses