There is now an official english translation: https://www.heise.de/ct/artikel/Exclusive-Spectre-NG-Multiple-new-Intel-CPU-flaws-revealed-several-serious-4040648

There is now an official english translation: https://www.heise.de/ct/artikel/Exclusive-Spectre-NG-Multiple-new-Intel-CPU-flaws-revealed-several-serious-4040648.html https://www.heise.de/ct/artikel/Exclusive-Spectre-NG-Multipl... c't and heise are not known to make statements like this willy-nilly. If they say it's serious, I would assume it is indeed serious.