CVE-2026-121556 Details
Description
FastBee through 2.1.0 contains an insecure direct object reference vulnerability in ProductController that allows authenticated tenant users to access other tenants' products by supplying their product IDs. Attackers can enumerate sequential product IDs to read MQTT account, password, and secret values, overwrite product configuration including tenant_id, or delete products with cascading rows.
A vulnerability allowing insecure direct object reference (IDOR) has been identified in FastBee versions through 2.1.0. This vulnerability resides within the ProductController, where authenticated tenant users can access products belonging to other tenants by manipulating product IDs. Exploitation involves sequentially enumerating product IDs to retrieve sensitive MQTT credentials (account, password, and secret), modify product configurations (including tenant IDs), or delete products along with associated data.
Users can update to FastBee version 2.1.0 or later, where this vulnerability has been fixed. Instructions for updating can be found in the official FastBee documentation.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Nov 3, 2026CISA-ADP
Assessed Nov 3, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| FastBee | <= 2.1.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 3, 2026 | CVE Modified | CISA-ADP |
| Nov 3, 2026 | New CVE Received | [email protected] |