I've noticed that lots of CVE at www.cvedetails.com do not have publicly available exploits. But they have high scores (ex: score higher than 9). With such a high score, I'd thought exploits would be readily available but it's not the case (not even present in exploitdb).
So how would a hacker, from the description at www.cvedetails.com write exploit code? Do hackers do that?