EUVD-2026-69197
GHSA-chwx-jgm7-v6jg
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Broker is a mesh-coordination component typically reachable on the adjacent mesh/LAN segment (AV:A); no data is read (C:N); kicking mesh state is limited integrity (I:L) but drives connectivity loss (A:H).
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
5DescriptionCVE.org
Incorrect access control in the meshInfoKick function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to kick or clean stale mesh information/state and trigger regeneration of mesh metadata via sending a crafted MQTT message to the cs_broker component.
AnalysisAI
Unauthenticated mesh-state manipulation in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets a remote attacker invoke the meshInfoKick function by publishing a crafted MQTT message to the internal cs_broker component, kicking or clearing stale mesh information and forcing regeneration of mesh metadata. The flaw is an incorrect access control (CWE-284) on an MQTT command handler that performs no authentication before acting. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the TOTOLINK T6's internal cs_broker MQTT component and the ability to publish a crafted MQTT message invoking the meshInfoKick handler; no authentication, credentials, or user interaction are needed (PR:N/UI:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS vector (AV:N/AC:L/PR:N/UI:N, C:H/I:H/A:H = 9.8) and the SSVC signals (Automatable: yes, Technical Impact: total) paint a critical picture, but the signals conflict with the described behavior and should be reconciled before treating the raw score at face value. … 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 data at time of analysis; monitor the TOTOLINK download portal (https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html) and the vendor-coordination trackers (https://github.com/DarkBoulder/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md, https://github.com/ShengWu00/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md) for firmware updates. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all TOTOLINK T6 routers in your environment and identify which are running firmware 4.1.5cu.748_B20211015; review network firewall rules and segment MQTT traffic (cs_broker) to trusted administrative networks only. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today