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CVE-2026-71262— IoTSharp BlobStorageController Missing Authentication and Path Traversal

Quick assessment

Affected
IoTSharp IoTSharp
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

IoTSharp是IoTSharp团队的一个物联网数据采集与处理平台。 IoTSharp存在授权问题漏洞，该漏洞源于BlobStorageController控制器缺少[Authorize]授权属性且未配置全局授权策略，导致未认证远程攻击者可访问文件操作端点，且路径和文件名参数未经过清理，存在路径遍历漏洞，可写入、读取、修改和删除任意文件，甚至可通过上传WebShell实现远程代码执行。

CVSS 9.8 · Critical EPSS 0.63% · P50

Affected Version Matrix 1

VendorProduct Version RangeStatus
IoTSharp IoTSharp ≤ * affected
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I. Basic Information for CVE-2026-71262

Vulnerability Information
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Vulnerability Title
IoTSharp BlobStorageController Missing Authentication and Path Traversal
Source: CVE Program / CVE List V5
Vulnerability Description
IoTSharp BlobStorageController.cs lacks the [Authorize] attribute applied to every other controller in the application (DevicesController, CustomersController, TenantsController, etc.), and no global authorization FallbackPolicy is configured in Startup.cs, leaving its Upload/Download/List/Modify/Delete endpoints reachable by unauthenticated remote attackers.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
IoTSharp 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IoTSharp是IoTSharp团队的一个物联网数据采集与处理平台。 IoTSharp存在授权问题漏洞，该漏洞源于BlobStorageController控制器缺少[Authorize]授权属性且未配置全局授权策略，导致未认证远程攻击者可访问文件操作端点，且路径和文件名参数未经过清理，存在路径遍历漏洞，可写入、读取、修改和删除任意文件，甚至可通过上传WebShell实现远程代码执行。
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
IoTSharp IoTSharp 0 ~ * -

II. Public POCs for CVE-2026-71262

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7285 chars
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III. Intelligence Information for CVE-2026-71262

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Other References for CVE-2026-71262 (1)

IV. Related Vulnerabilities

Same product: IoTSharp
Same vendor: IoTSharp
Same weakness: CWE-306

V. Comments for CVE-2026-71262

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