Organizations using Ebyte NE2-D11 devices should: 1) Isolate affected devices from untrusted networks where possible, 2) Monitor for vendor communications regarding patch availability, 3) Contact Ebyte directly for updates on remediation, 4) Implement network segmentation and strict access controls to limit exposure, 5) Credentials should be rotated if exposure is suspected due to CVE-2026-73839.
Quick answers
What is CVE-2026-73839?
Organizations using Ebyte NE2-D11 devices should: 1) Isolate affected devices from untrusted networks where possible, 2) Monitor for vendor communications regarding patch availability, 3) Contact Ebyte directly for updates on remediation, 4) Implement network segmentation and strict access controls to limit exposure, 5) Credentials should be rotated if exposure is suspected due to CVE-2026-73839.
How severe is CVE-2026-73839?
critical, CVSS 9.8
Is CVE-2026-73839 known to be exploited?
It is not marked known-exploited in this record.
How should CVE-2026-73839 be mitigated?
Organizations using Ebyte NE2-D11 devices should: 1) Isolate affected devices from untrusted networks where possible, 2) Monitor for vendor communications regarding patch availability, 3) Contact Ebyte directly for updates on remediation, 4) Implement network segmentation and strict access controls to limit exposure, 5) Credentials should be rotated if exposure is suspected due to CVE-2026-73839.
CVSS
9.8
Vendor
Ebyte
Published
Sep 30, 2026 · 08:43
Patch
Unknown / not confirmed
Affected products
Ebyte NE2-D11
Mitigation
Organizations using Ebyte NE2-D11 devices should: 1) Isolate affected devices from untrusted networks where possible, 2) Monitor for vendor communications regarding patch availability, 3) Contact Ebyte directly for updates on remediation, 4) Implement network segmentation and strict access controls to limit exposure, 5) Credentials should be rotated if exposure is suspected due to CVE-2026-73839.
The Cybersecurity and Infrastructure Security Agency (CISA) has published advisory ICSA-26-237-06 disclosing four vulnerabilities in the Ebyte NE2-D11 firmware (FW-9167-0-11). The flaws span missing authentication for critical functions, cleartext transmission of sensitive information, insufficiently protected credentials, and client-side authentication bypass. CVSS scores reach 9.8, indicating critical severity. Ebyte has acknowledged the issues and stated a patch is under development, but has not coordinated remediation with CISA, and no patch is currently available.