# CVE-2026-76133: Ebyte NE2-D11 weak authentication hashing

Source: https://junglewise.ai/threats/cve-2026-76133-ebyte-ne2-d11-weak-authentication-hashing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-31. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-76133 · Severity: critical · CVSS 9.8 · Published 2026-08-31

The Ebyte NE2-D11 is a network gateway device used in critical infrastructure environments to manage and control industrial systems. The device uses a deprecated hashing algorithm in its authentication mechanism that can be predicted or manipulated by an attacker, allowing them to bypass authentication and gain unauthorized administrative access, modify configurations, and disrupt operations across critical manufacturing and energy sectors worldwide.

Technologies: [Ebyte NE2-D11](https://junglewise.ai/threats/technologies/ne2-d11). Vendors: [Ebyte](https://junglewise.ai/threats/vendors/ebyte).

## Quick answers

**Is CVE-2026-76133 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76133 being exploited in the wild.

**How severe is CVE-2026-76133?** Critical severity, with a CVSS score of 9.8, published 31 August 2026.

**Which products and versions are affected?** Ebyte NE2-D11 Firmware FW-9167-0-11.

**Is there a fix for CVE-2026-76133?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-76133 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-76133?** Check whether you run Ebyte NE2-D11 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability stems from the use of a deprecated hashing algorithm in authentication-related operations within the Ebyte NE2-D11 firmware (FW-9167-0-11). The weak cryptographic construction allows attackers to predict or manipulate the authentication exchange, reducing the security assurance of the authentication mechanism. An attacker with network access can exploit this to bypass authentication controls without requiring valid credentials or user interaction, potentially gaining full administrative access to the device. Additionally, the advisory notes multiple related authentication weaknesses (CVE-2026-73125, CVE-2026-71187) including missing authentication enforcement and client-side authentication bypass. Ebyte has indicated a patch is under development but has not provided status updates or availability information to CISA.

## Affected products

- Ebyte NE2-D11 Firmware FW-9167-0-11

## Timeline

- 2026-08-25: disclosed
- 2026-08-31: advisory

## References

- [https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-237-06.json](https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-237-06.json)
- [https://www.cisa.gov/news-events/ics-advisories/icsa-26-237-06](https://www.cisa.gov/news-events/ics-advisories/icsa-26-237-06)

## Related threats

- [Ebyte NE2-D11 credentials exposure in configuration export](https://junglewise.ai/threats/cve-2026-77975-ebyte-ne2-d11-credentials-exposure-in-configuration-export)
- [Ebyte NE2-D11 privilege escalation via missing authorization](https://junglewise.ai/threats/cve-2026-77966-ebyte-ne2-d11-privilege-escalation-via-missing-authorization)
- [Ebyte NE2-D11 missing authentication in management interface](https://junglewise.ai/threats/cve-2026-73819-ebyte-ne2-d11-missing-authentication-in-management-interface)
- [Ebyte NE2-D11 authentication bypass in configuration utility](https://junglewise.ai/threats/cve-2026-77977-ebyte-ne2-d11-authentication-bypass-in-configuration-utility)
- [Ebyte NE2-D11 authentication bypass via client-side token manipulation](https://junglewise.ai/threats/cve-2026-76945-ebyte-ne2-d11-authentication-bypass-via-client-side-token)