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CVE-2026-5261— Shandong Hoteam InforCenter PLM BaseHandler.ashx uploadFileToIIS unrestricted upload

Quick assessment

Affected
Shandong Hoteam InforCenter PLM
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.

Hoteam InforCenter PLM是中国华天（Hoteam）公司的一款面向企业研发与制造过程的产品全生命周期管理平台。 Hoteam InforCenter PLM 8.3.8及之前版本存在代码问题漏洞，该漏洞源于对文件/Base/BaseHandler.ashx中参数File的错误操作，可能导致任意文件上传。

CVSS 7.3 · High EPSS 0.47% · P39

Possible ATT&CK Techniques 1 AI

T1505.003 · Web Shell
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I. Basic Information for CVE-2026-5261

Vulnerability Information
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Vulnerability Title
Shandong Hoteam InforCenter PLM BaseHandler.ashx uploadFileToIIS unrestricted upload
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was identified in Shandong Hoteam InforCenter PLM up to 8.3.8. The impacted element is the function uploadFileToIIS of the file /Base/BaseHandler.ashx. The manipulation of the argument File leads to unrestricted upload. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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
Hoteam InforCenter PLM 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hoteam InforCenter PLM是中国华天（Hoteam）公司的一款面向企业研发与制造过程的产品全生命周期管理平台。 Hoteam InforCenter PLM 8.3.8及之前版本存在代码问题漏洞，该漏洞源于对文件/Base/BaseHandler.ashx中参数File的错误操作，可能导致任意文件上传。
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
Shandong Hoteam InforCenter PLM 8.3.0 -

II. Public POCs for CVE-2026-5261

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III. Intelligence Information for CVE-2026-5261

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Other References for CVE-2026-5261 (1)

IV. Related Vulnerabilities

Same vendor: Shandong Hoteam
Same weakness: CWE-434

V. Comments for CVE-2026-5261

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