EUVD-2026-83139
GHSA-r4w3-cv5x-r5jx
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Remote unauthenticated reuse of hardcoded credentials (AV:N/AC:L/PR:N/UI:N) yielding read-only data exposure only, so C:L with I:N/A:N; scope kept U to match vendor.
Primary rating from Vendor (icscert).
CVSS VectorVendor: icscert
Lifecycle Timeline
3DescriptionCVE.org
Bransys ELD is shipped with hardcoded MQTT credentials, which will grant read access to real-time data for every active device across a subset of carriers that were connected to the affected MQTT broker.
AnalysisAI
Bransys ELD ships with hardcoded MQTT credentials that allow unauthenticated remote attackers to subscribe to the real-time telematics feed for every active device belonging to the subset of carriers that were connected to the affected MQTT broker. The assessed CVSS:3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) confirms the weakness is remotely reachable, low complexity, and requires no authentication or user interaction, but confines impact to low confidentiality - read-only exposure of real-time data with no integrity or availability effect, consistent with the vendor-side CVSS 4.0 score of 6.9 (VC:L, VI:N, VA:N). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the affected Bransys ELD product ship with the hardcoded MQTT credentials and that the target MQTT broker remain network-reachable and still accept those credentials; the victim device/carrier must have been connected to the affected broker. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N) describes a remotely reachable, low-complexity, unauthenticated weakness whose only impact is low confidentiality - read-only exposure of real-time telematics data, with no integrity or availability effect. … 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 has been identified at time of analysis, so the primary action is credential remediation on the broker side rather than client patching: rotate or revoke the hardcoded MQTT credential, disable anonymous and shared-credential authentication, and enforce per-device unique credentials or, better, mutual-TLS client certificates so that a single extracted secret no longer grants fleet-wide read access. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Hardcoded MQTT credentials shipped inside Bransys ELD grant unauthenticated read access to real-time telemetry for every
Bransys ELD ships with hardcoded MQTT credentials that grant read access to real-time telemetry for active devices acros
Same weakness CWE-798 – Use of Hard-coded Credentials
View allSame technique Authentication Bypass
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External POC / Exploit Code
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