EUVD-2026-69206
GHSA-g7gw-47jm-5w5x
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack writes slave inventory records (integrity impact, not confidentiality); AC:H reflects required MQTT message format knowledge; no confidentiality or availability impact described.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Incorrect access control in the sendStaticInfoToMaster function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to update stored slave inventory records via sending a crafted MQTT message to the cs_broker component.
AnalysisAI
Unauthenticated integrity manipulation in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 allows any network-accessible attacker to overwrite the master device's stored slave inventory records by sending crafted MQTT messages to the cs_broker component. The sendStaticInfoToMaster function performs no authentication or authorization check before processing incoming updates, exposing the internal device-management protocol to arbitrary writes. …
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 | The TOTOLINK T6 must be operating in a multi-device mesh or repeater configuration where the sendStaticInfoToMaster function is active and the cs_broker MQTT component is reachable over the network. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD-assigned CVSS 5.9 (Medium) uses AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N, but the impact metrics appear inconsistent with the described behavior: the vulnerability allows an attacker to write (update) slave inventory records, which is an integrity impact, not a confidentiality one. … 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 specific patched firmware version is confirmed in the available references at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
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