Hi MikroTik Team, We have two MikroTik CCR2116-12G-4S+ routers that suddenly started continuously rebooting. Both routers were working normally earlier, but now they keep restarting in a reboot loop. We connected to the routers using the serial console (PuTTY), but before we can enter the login cr…

Netinstall - RouterOS - MikroTik Documentation - you can use the hardware reset to force it into netinstall. I would try that as a first call. Based on your screenshot, I dont think you are going to be able to recover that.

Have you tried also the "other" bootloader? JFYI: [image] Netinstall on RM3011 Fails need help (technical questions) MikroTik hardware general Mikrotik devices have TWO bootloaders. Which one is selected at boot depends on the exact way you are resetting it. …

[image] savage: Netinstall - RouterOS - MikroTik Documentation - you can use the hardware reset to force it into netinstall. I would try that as a first call. Based on your screenshot, I dont think you are going to be able to recover that. Sure, we will try the hardware reset method first to …

The screenshot prints a stream of non-recoverable ECC (Error-Correcting Code) memory events. [edit] A fact that two routers have suddenly developed the same hardware issue is a mystery. Is there is more to this story? an attempt to replace RAM on these devices?

Can be the hack... No one ask RouterOS version or active services before both start to not work...

If I am reading the screenshot correctly these are hardware errors in pre-boot environment.

At the same time on 2 devices? Something that have changed memory frequencies on settings?...

Exactly, and this is the smoking gun. Two devices can't suddenly fail in the same way. In other words, either we are not being told the whole truth, or ... these devices were hacked. For example bootloaders were compromised. Let's say a remote hacker takes control of the devices, sets own update mi…

One more thing: posted by a user who registered a mere 3 hours ago...

Well, people need to start somewhere ... :astonished_face:

CCR2116-12G-4S+ continuously rebooting before login – need recovery guidance

RouterOS

jaclaz September 7, 2026, 2:19pm 3

Have you tried also the "other" bootloader?
JFYI: