What should I do if the 15-year validity source server certificate has leaked?

Website, Application, Performance
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What is the name of the domain?

Can’t disclose due to ongoing development with exposed APIs. It’s a .net domain

What is the issue you’re encountering

I immediately revoked the Origin server certificate in Cloudflare.However, my server is still using the revoked certificate. I tested whether it still functions properly, and found that it does. This indicates that revocation did not affect the old certificate. I feel there is a security risk. What should I do to completely stop the use of the old certificate?

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A post was merged into an existing topic: What should I do if the 15-year validity Origin server certificate has leaked?