CVE-2026-121556— FastBee through 2.1.0 IDOR via /iot/product By-ID Endpoints

Quick assessment

Affected

beecue FastBee

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FastBee 2.1.0 及更早版本中的 ProductController 存在不安全的直接对象引用漏洞。该漏洞允许已认证的租户用户通过提供产品 ID 来访问其他租户的产品。攻击者可以枚举连续的产品 ID，从而读取 MQTT 账户、密码和密钥值，覆盖产品配置（包括 tenant_id），或删除产品并触发级联行删除。

CVSS 8.3 · High Updated Nov 04, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

FastBee through 2.1.0 IDOR via /iot/product By-ID Endpoints

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Source: CVE Program / CVE List V5

Vulnerability Type

通过用户控制密钥绕过授权机制

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
beecue	FastBee	0 ~ 2.1.0	-

II. Public POCs for CVE-2026-121556

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-121556

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Other References for CVE-2026-121556 (7)

https://www.cve.org/CVERecord?id=CVE-2026-121556

IV. Related Vulnerabilities

Same product: FastBee

Same vendor: beecue

Same weakness: CWE-639