---
id: CVE-2026-105664
title: Guangzhou Juan IoT Technology EseeCloud Observable Response Discrepancy
summary: >-
  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 hold…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-204
vendor: 'Guangzhou Juan IoT Technology Co., Ltd.'
product: EseeCloud App
affected:
  - eseecloud_app <= 4.9.6
  - eseecloud_firmware <= 4.9.86.0
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-16T15:06:34.434306Z'
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:20:19.651Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-105664'
references:
  - url: 'https://eseecloud.app/'
  - url: 'https://www.cisa.gov/news-events/ics-advisories/icsa-26-288-02'
  - url: >-
      https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-288-02.json
tags:
  - cve.org
ingestedAt: '2026-10-16T15:11:47.135Z'
---

## Overview

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

- `eseecloud_app <= 4.9.6`
- `eseecloud_firmware <= 4.9.86.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

### Workarounds

Guangzhou Juan IoT Technology Co., Ltd. did not respond to CISA's coordination attempts. EseeCloud users are advised to contact Guangzhou Juan IoT Technology Co., Ltd. for support  https://eseecloud.app/  .