FastBee IDOR in device endpoints allows device takeover
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.
Summary
FastBee through 2.1.0 contains an insecure direct object reference in DeviceController that lets authenticated low-privilege users read and modify other tenants' devices. An attacker who self-registers can enumerate sequential deviceId or serialNumber values to read owner, IP and location data, and overwrite user_id and tenant_id to take over devices. This is tracked under CWE-639.
Written with Claude Haiku 5.5 from the sources below · 2026-10-27
Description from the CNA
FastBee through 2.1.0 contains an insecure direct object reference vulnerability in DeviceController that allows authenticated low-privilege users to read and modify other tenants' devices by supplying sequential device IDs. Self-registered attackers can enumerate deviceId or serialNumber values to read owner, IP, and location data, and overwrite user_id and tenant_id to take over devices.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for FastBee.
Written with Claude Haiku 5.5 from the sources below · 2026-10-27
Timeline
- 2026-10-13 Threatist record created from CVE-2026-110124
- 2026-10-13 Alias added: GHSA-pv4m-4fcw-r33m
- 2026-10-14 CISA SSVC decision points changed
- 2026-10-14 Priority changed: MEDIUM → HIGH
References
Other 3
- https://github.com/kerwincui/FastBee/blob/v2.1.0/springboot/fastbee-service/fastbee-iot-service/src/main/java/com/fastbee/iot/service/impl/DeviceServiceImpl.java#L105-L125
- https://github.com/kerwincui/FastBee/blob/v2.1.0/springboot/fastbee-open-api/src/main/java/com/fastbee/data/controller/DeviceController.java#L119-L211
- https://github.com/kerwincui/FastBee/blob/v1.2.1/springboot/wumei-iot/src/main/java/com/ruoyi/iot/controller/DeviceController.java#L118-L213
More kerwincui vulnerabilities
- TI-2026-75440 Insecure direct object reference in FastBee group endpoints CVSS 4.0MEDIUM 5.3
- TI-2026-06758 kerwincui FastBee Tool Download Endpoint ToolController.java ToolController.download path traversal CVSS 4.0MEDIUM 5.3
- TI-2026-06759 kerwincui FastBee System Notice SysNoticeController.java add cross site scripting CVSS 4.0MEDIUM 5.1
Sources
- CVE-2026-110124 · CVE Program
- CVE-2026-110124 · NVD
- FIRST EPSS
- GHSA-pv4m-4fcw-r33m · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences