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CVE-2026-77977

8.1 · HIGH

Ebyte gateway product's vendor configuration utility does not require authentication before allowing certain disruptive administrative actions when default credentials remain configured.

Published Aug 28, 2026CWE-306EPSS 0.37%

Overview

CVE-2026-77977 is a high-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

Ebyte gateway 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-237-06.jsonCISAwww.cisa.gov/news-events/ics-advisories/icsa-26-237-06

How CyberStrike helps

Frequently asked questions

What is CVE-2026-77977?

CVE-2026-77977 is a high-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-77977?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-77977?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-77977?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-77977 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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