You might already be aware that
Pearson Vue Credential Management System was breached and some data seems to have been leaked.
Cisco have actually got more to say about this than Pearson Vue does.
They have a blog up, which is being updated, here:
https://learningnetwork.cisco.com/blogs/community_cafe/2015/11/21/certifications-tracking-system-outage-and-data-exposure
What it means is that the certification tracking system is down (integral7.com, I believe). This also seems to mean that if you sat an exam recently, all you will have is the "pending" result that you get at the end of the day, and actual confirmation could take some days/weeks etc until the system is back online.