Why Certificate Outages Happen — and How to Prevent Them | CRYPTAS

An expired certificate can take down a website, an API or an entire service. Here is why it keeps happening — and how to stop it.

Few failures are as avoidable, or as embarrassing, as a certificate outage. A single expired TLS certificate can break a website, halt an API, or knock out a critical internal service — often at the worst possible moment and with no obvious cause until someone checks the expiry date. These incidents are almost never the result of an attack. They are the result of a process gap. And as certificate lifetimes shrink, that gap is widening fast.

Why outages keep happening

• Manual tracking. Spreadsheets and calendar reminders do not scale to thousands of certificates and inevitably miss some.
• No clear ownership. When no one owns a certificate, no one renews it; orphaned certificates are the classic cause of downtime.
• No visibility. Certificates issued outside official channels — by developers, vendors or cloud services — never make it onto the radar.
• Shrinking lifetimes. With public TLS validity heading to just 47 days by 2029, the renewal workload multiplies and manual methods break.

How to prevent them

• Discover continuously. Scan networks, cloud and pipelines to find every certificate, including the unmanaged ones.
• Centralise your inventory. Keep one source of truth with owner, expiry and location for each certificate.
• Automate renewal. Use ACME and CA integrations so certificates renew themselves before they expire.
• Monitor and alert. Set proactive alerts well ahead of expiry, and watch for weak keys and policy drift.
• Assign ownership. Make every certificate someone's responsibility, with escalation if renewal fails.

From reactive to resilient

Preventing outages is really about replacing human memory with automated process. Organisations that automate certificate discovery, renewal and monitoring not only stop the 3 a.m. incidents — they also close audit gaps under NIS2 and DORA and shrink the attack surface that forgotten certificates create. The shrinking-lifetime trend makes this shift urgent rather than optional.

How CRYPTAS helps

CRYPTAS combines certificate lifecycle management with managed services to give you continuous discovery, automated renewal and proactive monitoring across your entire certificate estate. We help you turn certificate outages from a recurring risk into a solved problem — and prepare you for the era of 47-day certificates.

Had one outage too many? Talk to CRYPTAS about automating certificate renewal and monitoring.