Advisories › Ebyte › ICSA-26-239-05
Ebyte NA111-M: 13 CVEs, Critical 9.8
Summary
CISA reports 13 vulnerabilities in Ebyte NA111-M Firmware. Weakness types: Missing Authentication for Critical Function, Use of GET Request Method With Sensitive Query Strings, Cross-Site Request Forgery (CSRF) (+8 more). Successful exploitation of these vulnerabilities could allow an attacker to fully compromise the device. Highest CVSS v3 score: 9.8 (Critical), exploitable over the network.
What to do: Act now: Ebyte acknowledged receipt of the reported vulnerabilities and indicated that a patch was under development.
At a glance
- Vendor
- Ebyte
- Products
- NA111-M Firmware
- CVEs
- CVE-2026-73125, CVE-2026-76179, CVE-2026-75814, CVE-2026-76940, CVE-2026-77966, CVE-2026-73809, CVE-2026-71187, CVE-2026-75548, CVE-2026-69658, CVE-2026-76133, CVE-2026-73819, CVE-2026-77975, CVE-2026-77977
- Highest CVSS v3
- 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Highest CVSS v4
- –
- Known exploited (KEV)
- No CVE from this advisory is on the KEV list as of the last refresh
- Sectors (per CISA)
- Information Technology
- Deployed
- Worldwide
- Vendor HQ
- China
Vulnerabilities
| CVE | Weakness | CVSS v3 | CVSS v4 | KEV | Description (from advisory) |
|---|---|---|---|---|---|
| CVE-2026-73125 | Missing Authentication for Critical Function | 9.8 | – | No | Ebyte device web management interface does not consistently enforce authentication before granting access to administrative functionality. An unauthenticated remote attacker could access sensitive configuration information, modify device settings, or disrupt availability. |
| CVE-2026-76179 | Use of GET Request Method With Sensitive Query Strings | 9.8 | – | No | An improper protection of authentication tokens vulnerability exists in certain Ebyte gateway products. Authentication tokens used by the web management interface are insufficiently protected during client-side session handling, which may allow an attacker with access to exposed session information to obtain and reuse a valid token. Successful exploitation could allow an attacker to impersonate an… |
| CVE-2026-75814 | Cross-Site Request Forgery (CSRF) | 8.8 | – | No | Ebyte device does not adequately verify the origin or authenticity of requests submitted to the web management interface. An unauthenticated remote attacker could persuade an authenticated administrator to visit a crafted page, causing unauthorized configuration changes or a disruption of device availability. |
| CVE-2026-76940 | Improper Restriction of Excessive Authentication Attempts | 7.5 | – | No | The affected Ebyte device does not restrict repeated authentication attempts through rate limiting or account lockout mechanisms. This could allow an attacker to perform automated authentication attacks against deployments that rely on password based authentication. |
| CVE-2026-77966 | Missing Authorization | 8.8 | – | No | The affected product does not provide separation between limited and administrative management functions. A low privileged authenticated attacker could access security sensitive configuration functions and modify settings that affect the confidentiality, integrity, or availability of the device. |
| CVE-2026-73809 | Cleartext Transmission of Sensitive Information | 7.5 | – | No | A cleartext transmission of sensitive information vulnerability exists in certain Ebyte gateway products. The web management interface does not adequately protect sensitive communications using transport-layer encryption. An attacker with access to network traffic could intercept authentication or session-related information transmitted between a user and the affected device. Successful exploitati… |
| CVE-2026-71187 | Use of Client-Side Authentication | 9.8 | – | No | 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. |
| CVE-2026-75548 | Improper Restriction of Rendered UI Layers or Frames | 5.4 | – | No | The affected Ebyte device web management interface does not restrict the interface from being rendered within an external frame. An unauthenticated remote attacker could use a crafted webpage to mislead an authenticated administrator into initiating unintended configuration changes or disruptive actions. |
| CVE-2026-69658 | Cleartext Transmission of Sensitive Information | 9.8 | – | No | MQTT credentials and control traffic are transmitted in cleartext, exposing sensitive information to network-level attackers. This may enable unauthorized device impersonation and disruption of messaging functions. |
| CVE-2026-76133 | Use of a Broken or Risky Cryptographic Algorithm | 9.8 | – | No | The affected product uses a deprecated hashing algorithm in an authentication-related operation. Under conditions where an attacker can manipulate or predict the authentication exchange, the weak construction may reduce the assurance provided by the authentication mechanism and facilitate unauthorized access. |
| CVE-2026-73819 | Weak Authentication | 9.8 | – | No | The affected product's vendor configuration utility permits access to administrative functions without verifying the operator's identity under certain credential conditions. An unauthenticated attacker on the adjacent network could modify critical settings or change access credentials, potentially preventing legitimate administrators from managing the device. |
| CVE-2026-77975 | Cleartext Storage of Sensitive Information | 6.5 | – | No | The affected product exports administrative credentials and other sensitive configuration information without adequate protection. An unauthenticated attacker on the adjacent network who can obtain an exported configuration file could recover valid credentials and use them to access the device or similarly configured systems. |
| CVE-2026-77977 | Missing Authentication for Critical Function | 8.1 | – | No | The affected product's vendor configuration utility does not require authentication before allowing certain disruptive administrative actions when default credentials remain configured. An unauthenticated attacker on the adjacent network could reboot the device or restore factory settings, resulting in a loss of configuration and service availability. |
Affected products (1)
- Ebyte NA111-M Firmware: 9013-2-17
Vendor fixes and mitigations (from advisory)
- Mitigation: Ebyte acknowledged receipt of the reported vulnerabilities and indicated that a patch was under development. However, the vendor has not responded to subsequent requests for coordination, and CISA has not been informed of the status or availability of the patch. Users are encouraged to reach out to Ebyte for more information.
Also apply CISA's standard ICS practices: minimize network exposure, keep control networks behind firewalls and isolated from business networks, and use up-to-date secure remote access.
Sources
This page is generated automatically from the CISA advisory text. It is not a substitute for the vendor's guidance; verify affected versions and fixes at the source before making changes to control systems.