CVE-2026-80233 PUBLISHED

CAYIN Technology｜CAYIN CMS-WS/CMS-SE/SMP - Arbitrary File Upload

Assigner: twcert
Reserved: 26.08.2026 Published: 26.08.2026 Updated: 26.08.2026

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.

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 7.2

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	High	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

CVSS 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
CVSS Score: 8.6

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	High
User Interaction	None

CVSS 4.0

Product Status

Vendor	CAYIN Technology
Product	CAYIN CMS-WS
Versions	Default: unaffected affected from 0 to 1.0.25336 (incl.)

Vendor	CAYIN Technology
Product	CAYIN CMS-SE
Versions	Default: unaffected affected from 0 to 11.0.25336 (incl.)

Vendor	CAYIN Technology
Product	CAYIN SMP
Versions	Default: unaffected affected from 0 to 4.0.25336 (incl.)

Solutions

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

References

Problem Types

CWE-434 Unrestricted Upload of File with Dangerous Type CWE

Impacts

CAPEC-650 Upload a Web Shell to a Web Server