Vulnerability · Published Oct 16, 2026 · Assigned by icscert
CVE-2026-105664Guangzhou Juan IoT Technology EseeCloud Observable Response Discrepancy
Medium 5.3
In plain English
A medium-severity security flaw in EseeCloud App from Guangzhou Juan IoT Technology Co., Ltd.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).
Official description
The endpoint exposes an observable response discrepancy when processing ID values. A request submitted with a nonexistent ID returns a distinct error response code from one submitted with a valid, registered ID, allowing an attacker holding a valid access token - but without further authentication or authorization - to distinguish valid ID values from the full 10-digit numeric search space. Combined with the absence of meaningful rate limiting on this endpoint, this discrepancy constitutes an enumeration oracle, enabling an attacker to discover registered devices at scale.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Guangzhou Juan IoT Technology Co., Ltd. | EseeCloud App | 0 – through 4.9.6 |
| Guangzhou Juan IoT Technology Co., Ltd. | EseeCloud Firmware | 0 – through 4.9.86.0 |
Weakness: CWE-204 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N