EUVD-2026-67289
GHSA-5733-jr78-jp2w
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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
Network-reachable with no auth or interaction required; admin access implies both confidentiality and integrity impact despite VI:N in provided CVSS 4.0.
Primary rating from Vendor (icscert).
CVSS VectorVendor: icscert
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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
Lifecycle Timeline
6DescriptionCVE.org
The affected Ebyte device relies on client-managed authentication tokens without sufficient server-side validation. An attacker may replay or manipulate authentication tokens to gain unauthorized access to administrative functionality.
AnalysisAI
Unauthorized administrative access in Ebyte NE2-D11 firmware is possible because the device delegates authentication state entirely to the client, performing no meaningful server-side token validation. An unauthenticated remote attacker can replay or forge authentication tokens to elevate access to administrative functionality without valid credentials. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special configuration is required beyond the device being network-reachable - the flaw is in the core authentication design of the firmware, not a specific optional feature. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 8.7 (AV:N/AC:L/AT:N/PR:N/UI:N) reflects a highly accessible attack: no privileges, no user interaction, low complexity, fully network-reachable. … 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 | Consult the ICS-CERT advisory ICSA-26-237-06 at https://www.cisa.gov/news-events/ics-advisories/icsa-26-237-06 for vendor-specific patch guidance - no specific fixed firmware version was confirmed in the data provided here. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Ebyte NE2-D11 devices in your environment and assess network exposure; isolate internet-facing instances and begin continuous monitoring for unauthorized access attempts. …
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Same weakness CWE-603 – Use of Client-Side Authentication
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External POC / Exploit Code
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