CVE-2026-111629IoTSharp through 3.6.1 Cross-Tenant Data Exposure via Customers and Devices APIs
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 16, 2026
Affected products
IoTSharp IoTSharp iotsharp:iotsharp (from the name) | through 3.6.1 | CNA record |
References
- https://hackmd.io/@hieuPenguinnn/iotsharp-devices-customers-cross-tenant-idorthird-party-advisory
- https://github.com/IoTSharp/IoTSharp/blob/v3.6.1/IoTSharp/Controllers/CustomersController.cs#L164-L177technical-description
- https://github.com/IoTSharp/IoTSharp/blob/v3.6.1/IoTSharp/Controllers/DevicesController.cs#L490-L507technical-description
- https://www.vulncheck.com/advisories/iotsharp-through-3.6.1-cross-tenant-data-exposure-via-customers-and-devices-apisthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.