CVE-2026-77977 Ebyte NA111-M Missing Authentication for Critical Function
Unauthenticated attackers on the adjacent network can reboot the device or restore factory settings, causing service disruption and configuration loss.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77977?
CVE-2026-77977 is a high-severity missing authorization vulnerability in Ebyte NA111-M Firmware, published on 27 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-306
Which versions are affected by CVE-2026-77977?
How do I fix CVE-2026-77977?
No fix has been published for CVE-2026-77977 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-77977 being exploited?
There is no known exploitation of CVE-2026-77977 in the wild and no public exploit code.
Sources
Also known as GHSA-8g5x-wgwr-8jwp.