{"id":"CVE-2026-111654","title":"FastBee through 2.1.0 IDOR via /iot/group By-ID Endpoints","summary":"FastBee through 2.1.0 contains an insecure direct object reference vulnerability that allows authenticated low-privilege users to access other users' device groups because GroupController queries lack owner checks. Attackers, including s…","severity":"medium","cvss":6.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","cvssSource":"cna","cwe":["CWE-639"],"vendor":"kerwincui","product":"FastBee","affected":["FastBee <= 2.1.0"],"published":"2026-10-16","updated":"2026-10-16","sourceUpdated":"2026-10-16T17:39:20.715Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111654","references":[{"url":"https://hackmd.io/@hieuPenguinnn/fastbee-device-group-cross-user-idor"},{"url":"https://github.com/kerwincui/FastBee/blob/v2.1.0/springboot/fastbee-open-api/src/main/java/com/fastbee/data/controller/GroupController.java#L70-L137"},{"url":"https://github.com/kerwincui/FastBee/blob/v2.1.0/springboot/fastbee-service/fastbee-iot-service/src/main/java/com/fastbee/iot/service/impl/GroupServiceImpl.java#L37-L143"},{"url":"https://github.com/kerwincui/FastBee/blob/v2.1.0/springboot/fastbee-service/fastbee-iot-service/src/main/resources/mapper/iot/GroupMapper.xml#L36-L109"},{"url":"https://www.vulncheck.com/advisories/fastbee-through-2.1.0-idor-via-iot-group-by-id-endpoints","label":"VulnCheck Advisory: FastBee through 2.1.0 IDOR via /iot/group By-ID Endpoints"}],"tags":["cve.org"],"ingestedAt":"2026-10-16T18:43:08.675Z","slug":"CVE-2026-111654","body":"## Overview\n\nFastBee through 2.1.0 contains an insecure direct object reference vulnerability that allows authenticated low-privilege users to access other users' device groups because GroupController queries lack owner checks. Attackers, including self-registered users, can supply sequential group IDs to read, overwrite, reassign, rewrite device associations of, or delete other users' groups.\n\n## Affected\n\n- `FastBee <= 2.1.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":34.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}