CVE-2026-77977
highpriority · track · 0OT risk · elevatedEPSS 0.004 · 30 %ileUSEPSS · scored 2026-10-27
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.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
No vendor fix yet; a mitigation is available.
- MitigationNA111-M Firmwarecisa_csaf_ot
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.1–8.1
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- ICSA-26-239-05Ebyte NA111-M2026-08-27icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could allow an attacker to fully compromise the device.
sources
Which sources assert this record, and when.
references (2) nvd
External citations — patches, advisories, analysis.
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