CVE-2026-77977highCWE-306

CVE-2026-77977: high-severity vulnerability in Ebyte NA111-M Firmware

Ebyte NA111-M Missing Authentication for Critical Function

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.2epss 0.4%
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.
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
Ebyte · Ebyte NA111-M Firmware
Related CVEs — Ebyte NA111-M Firmware

In the same product, most dangerous first.

CVE-2026-73125CRITICALEbyte NA111-M Missing Authentication for Critical FunctionEPSS 0.8%CVE-2026-71187CRITICALEbyte NA111-M Use of Client-Side AuthenticationEPSS 0.8%CVE-2026-76179CRITICALEbyte NA111-M Use of GET Request Method With Sensitive Query StringsEPSS 0.7%CVE-2026-73819CRITICALEbyte NA111-M Weak AuthenticationEPSS 0.5%CVE-2026-76940HIGHEbyte NA111-M Improper Restriction of Excessive Authentication AttemptsEPSS 0.5%CVE-2026-77966HIGHEbyte NA111-M Missing AuthorizationEPSS 0.4%