# CVE-2026-71187: Ebyte device authentication bypass via client-side logic

Source: https://junglewise.ai/threats/cve-2026-71187-ebyte-device-authentication-bypass-via-client-side-logic  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-28. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-71187 · Severity: critical · CVSS 9.8 · Published 2026-08-28

Ebyte wireless data transmission devices use authentication logic that is executed on the client side and can be replicated by attackers without valid credentials. An unauthenticated attacker can forge valid authentication requests to gain administrative access to the device, potentially allowing unauthorized configuration, monitoring of communications, or device takeover.

Vendors: [Ebyte](https://junglewise.ai/threats/vendors/ebyte).

## Quick answers

**Is CVE-2026-71187 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-71187 being exploited in the wild.

**How severe is CVE-2026-71187?** Critical severity, with a CVSS score of 9.8, published 28 August 2026.

**Which products and versions are affected?** Ebyte Ebyte device.

**Is there a fix for CVE-2026-71187?** 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-2026-71187 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-71187?** Check whether you run Ebyte device. 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 is an authentication bypass resulting from improper implementation of security controls—specifically, reliance on client-side authentication logic that is reproducible without possession of legitimate credentials. The vulnerable component handles device access control. The attack vector is network-based and requires no prior authentication or user interaction; an attacker can craft valid authentication requests from any network position. Successful exploitation grants full administrative access to the affected device, enabling configuration changes, data interception, and system compromise. Patch availability is not specified in the advisory information provided.

## Affected products

- Ebyte Ebyte device

## Timeline

- 2026-08-28: disclosed
- 2026-08-28: 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)