I have the feeling that for some time now the CVE scores are insane. A while back we have a security issue with a dependency in Java that had a score of 9 I believe. It had a requirement that the attacker had root access.
A high severity CVE can have zero impact on your system because the vulnerable code path is unreachable, and a pair of low severity CVEs in your system components/libraries can compound and create a critical vulnerability in your system.