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CVE-2026-111629— IoTSharp through 3.6.1 Cross-Tenant Data Exposure via Customers and Devices APIs

Quick assessment

Affected
IoTSharp IoTSharp
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.

IoTSharp 3.6.1 及更早版本存在不安全直接对象引用漏洞。由于“客户（Customers）”和“设备（Devices）”API 处理器未将查询范围限定在调用者所属的租户内，任何已认证用户均可读取其他租户的数据。攻击者可通过匿名端点 自行注册，并传入其他租户的 GUID，从而读取客户联系信息、设备清单以及设备属性遥测数据。

CVSS 4.3 · Medium EPSS 0.25% · P16

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
IoTSharp IoTSharp ≤ 3.6.1 affected
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I. Basic Information for CVE-2026-111629

Vulnerability Information
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Vulnerability Title
IoTSharp through 3.6.1 Cross-Tenant Data Exposure via Customers and Devices APIs
Source: CVE Program / CVE List V5
Vulnerability Description
IoTSharp through 3.6.1 contains an insecure direct object reference vulnerability that allows any authenticated user to read other tenants' data because Customers and Devices API handlers do not scope queries to the caller's tenant. Attackers can self-register through the anonymous AccountController.Create endpoint and supply other tenants' GUIDs to read customer contact details, device inventories and device attribute telemetry.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
IoTSharp IoTSharp 0 ~ 3.6.1 -

II. Public POCs for CVE-2026-111629

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-111629

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Vendor Advisories for CVE-2026-111629 (1)

Proof of Concept for CVE-2026-111629 (1)

Security Blog Posts for CVE-2026-111629 (1)

IV. Related Vulnerabilities

Same product: IoTSharp
Same vendor: IoTSharp
Same weakness: CWE-639

V. Comments for CVE-2026-111629

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