CVE-2026-77602 OpenC3 COSMOS: Authenticated remote code execution via the user-writable config overlay (table definitions, cmd/tlm definitions, and script suites)

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.1.0 until 7.3.0, authenticated non-administrator users can write content under targetsmodified/ that is later executed by multiple configuration paths below the intended...

CVE-2026-77602 OpenC3 COSMOS: Authenticated remote code execution via the user-writable config overlay (table definitions, cmd/tlm definitions, and script suites)

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.1.0 until 7.3.0, authenticated non-administrator users can write content under targetsmodified/ that is later executed by multiple configuration paths below the intended...

CVE-2026-77602 OpenC3 COSMOS: Authenticated remote code execution via the user-writable config overlay (table definitions, cmd/tlm definitions, and script suites)

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.1.0 until 7.3.0, authenticated non-administrator users can write content under targetsmodified/ that is later executed by multiple configuration paths below the intended...

OpenC3 COSMOS - Authenticated remote code execution via the user-writable config overlay (table definitions, cmd/tlm definitions, and script suites)

Summary COSMOS reads configuration from a user-writable overlay targetsmodified/ before the read-only plugin-installed targets/ tree, and the config subsystem executes code on those files: ConfigParser renders every file as ERB by default, a GENERICREADCONVERSION / GENERICWRITECONVERSION block is...