Some modern CPUs have moved the TPM inside the CPU itself. But traditionally, TPMs were attached via the LPC (low pin-count) bus, and you could absolutely sniff them or de-solder them and arbitrarily MiTM.
Some modern CPUs have moved the TPM inside the CPU itself. But traditionally, TPMs were attached via the LPC (low pin-count) bus, and you could absolutely sniff them or de-solder them and arbitrarily MiTM.