Reviving TEMPEST Attacks With An Injected Signal

Researchers demonstrated a new TEMPEST-style side-channel attack called InjectEave that revives radio eavesdropping against modern, quieter electronics. By irradiating a device with a tuned RF signal, nonlinear components like amplifiers and ADCs mix the injected signal with internal circuit activity, creating sidebands that radiate detectable information. Using a USRP B210 SDR and a spectrum analyzer, the team recovered audio from wired and wireless headphones, a wireless landline, and even remotely injected synthesized speech into a live VoIP call, working through walls and up to 30 meters with amplification.

Source: https://hackaday.com/2026/09/20/reviving-tempest-attacks-with-an-injected-signal. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.