CVE-2026-111629CWE-639

CVE-2026-111629

Medium · published October 16, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
15.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00251 · 15.5th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-10-16T22:17Z
References (5)
https://github.com/IoTSharp/IoTSharp/blob/v3.6.1/IoTSharp/Controllers/CustomersController.cs#L164-L177 · [email protected]https://github.com/IoTSharp/IoTSharp/blob/v3.6.1/IoTSharp/Controllers/DevicesController.cs#L490-L507 · [email protected]https://hackmd.io/@hieuPenguinnn/iotsharp-devices-customers-cross-tenant-idor · [email protected]https://www.vulncheck.com/advisories/iotsharp-through-3.6.1-cross-tenant-data-exposure-via-customers-and-devices-apis · [email protected]https://hackmd.io/@hieuPenguinnn/iotsharp-devices-customers-cross-tenant-idor · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 18 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 16 OCT 17:39Z
    IoTSharp through 3.6.1 Cross-Tenant Data Exposure via Customers and Devices APIs
    cvelistv5
  • 16 OCT 17:39Z
    IoTSharp through 3.6.1 Cross-Tenant Data Exposure via Customers and Devices APIs
    cvelistv5