What is the difference between security ratings A and B?
Rating A indicates a very strong, mature defensive posture, while rating B indicates a good posture with a few areas still to strengthen.
TL;DR
- The difference between ratings A and B is control consistency: A means nearly all observable signals are in good shape; B means some low-to-medium severity findings remain.
- Both are strong ratings; the gap is in the remaining findings and their severity.
- The finding details show exactly what separates the two.
Short definition
The main difference between ratings A and B is control consistency: rating A means nearly all observable security signals are in good shape, while rating B means some low-to-medium severity findings remain unaddressed.
How do letter grades map to risk scores?
On the CyberRank scale, letter grades map from the aggregate risk score. Rating A generally requires strong TLS configuration, complete email security (SPF, DKIM, DMARC), few open ports, no active leaked credentials, and no exposed admin portals.
Rating B does not mean insecure — it usually takes a few targeted fixes, such as retiring old subdomains or enabling DMARC. A single letter difference often decides whether a vendor passes due diligence.
What are some practical examples?
- Vendor A: modern TLS, DMARC active, no major findings → rating A.
- Vendor B: mostly good, but an admin portal is still open → rating B.
- In tenders, companies set a minimum rating B requirement for prospective vendors.
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