EUVD-2026-67282
GHSA-rj7p-436q-6xv2
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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
Client-side auth bypass is remotely reachable and unauthenticated (AV:N/AC:L/PR:N/UI:N) and yields full admin control of the device, so C/I/A:H with no scope change.
Primary rating from Vendor (icscert).
CVSS VectorVendor: icscert
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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
5DescriptionCVE.org
The Ebyte device relies on client side authentication logic that can be reproduced by unauthenticated users. An attacker may generate valid authentication requests and bypass authentication to obtain administrative access to the device.
AnalysisAI
Authentication bypass in the Ebyte NE2-D11 serial-to-Ethernet gateway firmware lets unauthenticated remote attackers gain full administrative control by reproducing the device's client-side authentication logic. Because the login check runs in the client rather than being enforced server-side, an attacker can craft valid authentication requests without any credentials. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires only network access to the NE2-D11 web/management interface; per the CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N) there is no authentication, no user interaction, and no special attack requirement. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | All available signals point to genuine high priority for exposed devices. … 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; consult the CISA ICS advisory ICSA-26-237-06 (https://www.cisa.gov/news-events/ics-advisories/icsa-26-237-06) for the vendor's fixed firmware release and apply it once confirmed. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: conduct a complete inventory of Ebyte NE2-D11 devices across your network, including their network locations and connectivity status, and immediately flag any that are internet-accessible. …
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Same weakness CWE-603 – Use of Client-Side Authentication
View allSame technique Authentication Bypass
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External POC / Exploit Code
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