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CVE-2026-80233— CAYIN Technology｜CAYIN CMS-WS/CMS-SE/SMP - Arbitrary File Upload

Quick assessment

Affected
CAYIN Technology CAYIN CMS-WS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cayin CMS-WS是中国Cayin公司的一款支持多场景的内容管理软件。 Cayin CMS-WS 1.0.25336及之前版本、CAYIN CMS-SE 11.0.25336及之前版本和CAYIN SMP 4.0.25336及之前版本存在任意文件上传漏洞，该漏洞源于任意文件上传漏洞，可能导致特权远程攻击者上传并执行Web Shell后门，从而实现服务器上的任意代码执行。

CVSS 7.2 · High EPSS 0.82% · P56

Affected Version Matrix 3

VendorProduct Version RangeStatus
CAYIN Technology CAYIN CMS-SE ≤ 11.0.25336 affected
CAYIN Technology CAYIN CMS-WS ≤ 1.0.25336 affected
CAYIN Technology CAYIN SMP ≤ 4.0.25336 affected
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I. Basic Information for CVE-2026-80233

Vulnerability Information
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Vulnerability Title
CAYIN Technology｜CAYIN CMS-WS/CMS-SE/SMP - Arbitrary File Upload
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
Cayin CMS-WS 任意文件上传漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cayin CMS-WS是中国Cayin公司的一款支持多场景的内容管理软件。 Cayin CMS-WS 1.0.25336及之前版本、CAYIN CMS-SE 11.0.25336及之前版本和CAYIN SMP 4.0.25336及之前版本存在任意文件上传漏洞，该漏洞源于任意文件上传漏洞，可能导致特权远程攻击者上传并执行Web Shell后门，从而实现服务器上的任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
CAYIN Technology CAYIN CMS-WS 0 ~ 1.0.25336 -
CAYIN Technology CAYIN CMS-SE 0 ~ 11.0.25336 -
CAYIN Technology CAYIN SMP 0 ~ 4.0.25336 -

II. Public POCs for CVE-2026-80233

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III. Intelligence Information for CVE-2026-80233

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Other References for CVE-2026-80233 (2)

IV. Related Vulnerabilities

Same product: CAYIN CMS-WS
Same vendor: CAYIN Technology
Same weakness: CWE-434

V. Comments for CVE-2026-80233

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