EUVD-2026-69203
GHSA-gf47-4p7m-mgvm
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Network-reachable MQTT endpoint requires no authentication; impact limited to low confidentiality from triggering static device info reporting with no integrity or availability consequence.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Incorrect access control in the staticInfoSend function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to trigger static information reporting to the configured master via sending a crafted MQTT message to the cs_broker component.
AnalysisAI
Unauthenticated access control bypass in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 allows any network-accessible attacker to trigger the staticInfoSend function by sending a crafted MQTT message to the cs_broker component, causing the device to report its static configuration data to the configured master server. The CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms no authentication or user interaction is required. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must be able to reach the TOTOLINK T6's cs_broker MQTT service on the network (default port 1883/TCP). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 5.3 Medium (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) accurately characterizes the threat profile: trivially reachable with no authentication barrier, but impact is constrained to low confidentiality - the attacker triggers reporting of static device data rather than gaining direct read access to that data themselves. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch version is identified in the available input data; confirm patch availability directly at the TOTOLINK firmware download page (https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html) and apply any available firmware update. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
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