https://www.bleepingcomputer.com/news/security/new-netspectre-attack-can-steal-cpu-secrets-via-network-connections/

Scientists have published a paper today detailing a new Spectre-class CPU attack that can be carried out via network connections and does not require the attacker to host code on a targeted machine.

This new attack —codenamed NetSpectre— is a major evolution for Spectre attacks, which until now have required the attacker to trick a victim into downloading and running malicious code on his machine, or at least accessing a website that runs malicious JavaScript in the user's browser.