Unauthenticated RCE in Motorola's MR2600 Router
A security researcher details the discovery of an unauthenticated remote code execution vulnerability in the Motorola MR2600 router. The flaw stems from improper validation of firmware update files within the device's CGI scripts.
Why it matters
This highlights critical security risks in consumer networking hardware and the importance of secure firmware update processes.
I'm currently on a quest to find at least one Remote Code Execution vulnerability per router vendor. This is the story of how I found an unauthenticated RCE in Motorola's MR2600 router.
The first problem I had to solve was acquiring the firmware. For the majority of their routers, Motorola doesn't distribute the firmware publicly; instead, it is only ever distributed via over-the-air updates.
The first exception to this rule that I could find was the Motorola MR2600. It was a Wi-Fi 5 router, with the last firmware update (v1.0.22) released in mid-2024.
https://help.motorolanetwork.com/kb/mr2600/mr2600-software-updates
With the firmware downloaded, I extracted the filesystem and started digging through the router's CGI scripts and SOAP handlers to see how a legitimate manual update actually worked.
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