Ebyte NE2-D11 Firmware: Use of Client-Side Authentication
CVE-2026-76945 is a high-severity use of client-side authentication vulnerability in Ebyte NE2-D11 Firmware from Ebyte, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Ebyte NE2-D11 Firmware versions: FW-9167-0-11. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.5% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Ebyte NE2-D11 Firmware you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Ebyte | Ebyte NE2-D11 Firmware | FW-9167-0-11 | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by CNA (hq.dhs.gov).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 8.7 | High | CNA (hq.dhs.gov) |
| CVSS 3.1 | 7.5 | High | CNA (hq.dhs.gov) |
Official description
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.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Use of Client-Side Authentication
A client/server product performs authentication within client code but not in server code, allowing server-side authentication to be bypassed via a modified client that omits the authentication check.
How developers prevent this class of flaw
- Do not rely on client side data. Always perform server side authentication.
More Use of Client-Side Authentication vulnerabilities (CWE-603)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other references
Other vulnerabilities in Ebyte NE2-D11 Firmware
- 7.5 High severity
Recent Use of Client-Side Authentication vulnerabilities
- 9.8 Critical severity
- 8.7 High severity
- 8.4 High severity
- 7.8 High severity
- 9.8 Critical severity
- 8.8 High severity
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