Incorrect access control in the sendStaticInfoToMaster function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to update… (CVE-2026-51748)
Description
An incorrect access control vulnerability exists in the sendStaticInfoToMaster function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. This flaw allows unauthenticated attackers to update stored slave inventory records by sending a crafted MQTT message to the cs_broker component. The vulnerability has a CVSS 3.1 base score of 5.9, indicating a medium severity level. No patch or remediation information is currently available.
CVSS v3.1
Score 5.9medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-51748 describes an access control weakness in the sendStaticInfoToMaster function of TOTOLINK T6 4.1.5cu.748_B20211015. Unauthenticated attackers can exploit this by sending specially crafted MQTT messages to the cs_broker component, enabling them to update stored slave inventory records without authorization. The vulnerability is classified under CWE-284 (Improper Access Control) and has a CVSS 3.1 score of 5.9 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N). No known exploits in the wild or vendor patches have been reported.
Potential Impact
Successful exploitation allows unauthenticated attackers to modify stored slave inventory records on the affected device. This could lead to unauthorized data manipulation, potentially impacting system integrity. Confidentiality impact is high, while integrity and availability impacts are not indicated.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict network access to the MQTT service and monitor for unusual MQTT traffic to mitigate exploitation risk.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-g7gw-47jm-5w5x
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-51748"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a98458bacd9273b496add76
Added to database: 09/02/2026, 15:49:31 UTC
Last enriched: 09/07/2026, 21:08:56 UTC
Last updated: 10/16/2026, 06:48:17 UTC
Views: 29
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