PKI certificate outages are a visibility and automation problem

At a glance

What this is: This is an analysis of why PKI certificate outages keep happening and why visibility plus automation materially reduce both downtime and security exposure.

Why it matters: It matters because certificate governance sits inside identity security, and the same inventory, ownership, and lifecycle gaps that break PKI also weaken wider NHI, IAM, and access governance programmes.

By the numbers:

• The Forrester study found 18 to 22 certificate-related incidents per year for the composite enterprise, with each incident costing an average of $100,000.
• After deployment, the composite organisation reduced certificate-related incidents by 85% in year one, 90% in year two, and 95% by year three.
• Audit processes became 30% more efficient after deployment, according to the Forrester study cited by Keyfactor.
• Approximately 5% of security incidents involving external or internal attacks were related to certificate vulnerabilities.

👉 Read Keyfactor's analysis of preventable PKI certificate outages

Context

PKI certificate outages are what happens when cryptographic identity is treated as a series of manual tasks instead of a governed lifecycle. In practice, expiry, misconfiguration, and shadow ownership become operational failures that affect availability first and security second.

For IAM and NHI teams, the lesson is broader than certificates alone. Any identity estate that depends on scattered ownership, incomplete inventory, and manual remediation will eventually produce outages, audit pain, and preventable exposure.

The article argues that the real control gap is not the certificate itself but the absence of centralized visibility and automated lifecycle enforcement across distributed environments. That is the same governance failure pattern identity teams see in service accounts, tokens, and other non-human credentials.

Key questions

Q: How should security teams prevent certificate outages in distributed environments?

A: Security teams should centralise certificate inventory, assign explicit ownership, and automate both renewal and deployment. Most outages happen because no one knows a certificate exists, who owns it, or whether the renewed certificate was installed everywhere it needed to be. The fix is lifecycle control, not isolated renewal tooling.

Q: Why do manual certificate processes still cause outages after renewal?

A: Manual processes fail because renewal and installation are different steps, and either one can break production. Teams often renew a certificate successfully but miss a dependency, install it on the wrong endpoint, or leave an old version in place. That is why renewal automation without deployment validation still leaves outage risk in place.

Q: What do organisations get wrong about certificate visibility?

A: They assume visibility is a reporting task when it is actually a control boundary. If certificates are scattered across teams and tools, security leaders cannot prove ownership, track expiry, or validate lifecycle state. Without a trusted inventory, audit readiness and outage prevention both fail.

Q: Who is accountable when certificate governance fails?

A: Accountability should sit with the team that owns the certificate lifecycle end to end, not just the team that issued or installed a certificate once. Governance failures usually happen when responsibility is split across operations, application teams, and security without a single control owner. The accountable function must own inventory, renewal, deployment, and verification.

Technical breakdown

Why certificate inventory failure causes outages

A certificate outage usually begins long before expiry. When organisations cannot inventory every certificate across cloud, on-premises, application, and team-owned environments, they lose the ability to correlate ownership, expiration dates, and dependencies. That creates blind spots where certificates expire unnoticed or are renewed too late. The operational issue is not merely missing data. It is the lack of a reliable system of record for cryptographic identity, which means no one can answer basic questions about what exists, who owns it, or what will break if it changes.

Practical implication: build an authoritative certificate inventory before trying to optimize renewal or automation.

How manual renewal and installation create failure points

Certificate renewal is only one part of the lifecycle. Teams also have to deploy the renewed certificate correctly to the right endpoints, services, and dependent systems. Manual deployment is fragile because a single missed target, mismatched chain, or uncoordinated change window can cause an outage even when renewal itself succeeded. In large estates, the problem compounds across environments and teams. This is why automation has value beyond speed: it reduces human error at the exact point where small mistakes become service interruptions.

Practical implication: automate both renewal and deployment, not just certificate issuance.

What shadow certificate management does to governance

When teams manage certificates independently, they create shadow governance. Security leaders lose visibility into which certificates exist, which tools were used to issue them, and whether renewal is being tracked consistently. That fragmentation makes audit work slower, but the larger issue is risk concentration outside central oversight. Shadow certificates are especially dangerous because they are often the ones no one is monitoring. The result is a governance model that depends on informal coordination rather than enforceable lifecycle control.

Practical implication: remove team-by-team certificate sprawl by centralising policy, ownership, and monitoring.

Threat narrative

Attacker objective: The operational objective is not stealth but disruption, using certificate failure to break availability and create costly downtime.

1. Entry occurs when a certificate expires unexpectedly or is installed incorrectly because no central inventory tracked its lifecycle.
2. Escalation follows when fragmented ownership and manual deployment let the failure propagate across applications, environments, or dependent services.
3. Impact is service outage, customer disruption, lost productivity, and measurable revenue loss, with some organisations facing regulatory or contractual penalties.

Breaches seen in the wild

• Sisense breach — unauthorized GitLab access led to exfiltration of access tokens, API keys and certificates.
• Cisco DevHub NHI breach — IntelBroker exploited exposed Cisco credentials, API tokens and keys in DevHub.

Read our 52 NHI Breaches Analysis report for a comprehensive view of breaches impacting Non-Human Identities including AI Agents.

NHI Mgmt Group analysis

PKI certificate outages are an identity governance failure, not a technical surprise. The article describes the same pattern identity teams see in other unmanaged credentials: weak inventory, unclear ownership, and manual lifecycle handling. When a certificate can expire without a responsible owner seeing it, the governance model has already failed. The practical conclusion is that cryptographic identity needs the same lifecycle discipline as service accounts and tokens.

Certificate visibility is the control that turns outage prevention from guesswork into governance. The Forrester figures quoted here show the scale of the problem: 18 to 22 incidents a year and $100,000 per incident is not noise, it is a repeatable operating cost. In NIST CSF terms, the issue sits squarely in identify and protect functions, because what cannot be inventoried cannot be governed. Practitioners should treat visibility as the prerequisite for every downstream control.

Automated deployment matters because renewal alone does not close the failure path. A certificate can be renewed and still break production if installation is incomplete, misordered, or inconsistent across dependent systems. That is why manual processes remain the real root cause, not the certificate format itself. Teams should read this as a warning that partial automation will leave the outage vector intact.

Certificate lifecycle governance is now part of broader cryptographic resilience planning. The article rightly links certificate control to PCI DSS 4.0, DORA, and the EU Cyber Resilience Act because cryptographic assets have become compliance-sensitive infrastructure. That makes certificate governance a board-level resilience issue, not a narrow platform task. Organisations that cannot see their certificates will struggle to prove control over any other distributed identity asset.

Identity programmes that already struggle with NHI sprawl will recognise the same failure mode here. The governance lesson is that decentralised issuance and unowned lifecycle state create hidden risk regardless of whether the identity is human, machine, or cryptographic. The named concept here is certificate shadow governance: lifecycle management that exists in pockets but not as enforceable organisational control. Practitioners should use that lens to prioritise central policy over local convenience.

From our research:

• 57% of organisations lack a complete inventory of their machine identities, according to The Critical Gaps in Machine Identity Management report.
• 61% rely on spreadsheets or manual tracking for machine identity management, which is why lifecycle visibility remains a recurring failure mode.
• The broader control lesson is captured in NHI Lifecycle Management Guide, which shows why inventory, ownership, rotation, and offboarding have to be treated as one governance system.

What this signals

Certificate governance is converging with the wider machine identity problem. When 57% of organisations lack a complete inventory of their machine identities, the same visibility failure that drives PKI outages also weakens service account and workload identity governance. Teams that still manage certificates separately from broader identity lifecycle controls are likely carrying duplicate blind spots.

The operational signal for practitioners is clear: certificate outages rarely arrive as isolated events. They are the downstream effect of incomplete discovery, fragmented ownership, and manual handling, so improvement should be measured in reduced blind spots rather than just fewer renewals. Linking certificate governance to the NIST Cybersecurity Framework 2.0 helps teams frame this as an identify, protect, and recover problem rather than a tooling issue.

Certificate shadow governance: lifecycle state exists in local teams, but not as enforceable enterprise control. That pattern will keep reappearing wherever identity assets can be created faster than they are inventoried, which is why NHI programmes and PKI teams need a shared operating model.

For practitioners

• Establish a single certificate inventory Create one authoritative view of all certificates across cloud, on-premises, applications, and team-owned tooling, then assign named ownership for each asset before the next renewal cycle. Use that inventory to expose shadow certificates and dependency chains.
• Automate renewal and deployment together Do not stop at renewal automation. Validate that renewed certificates are deployed correctly to every endpoint and dependency, with checks that catch missing chains, incomplete installs, and environment drift before production impact.
• Tie certificate lifecycle to compliance evidence Map certificate discovery, rotation, and audit records to PCI DSS 4.0, DORA, and EU Cyber Resilience Act obligations so the same control set supports resilience and reporting. This reduces manual audit work and makes gaps visible earlier.
• Measure outage reduction by failure mode Track expiry-related outages, deployment-related outages, and shadow-certificate findings separately so teams can see whether the control failure is inventory, process, or validation. That distinction prevents generic remediation plans that miss the real cause.

Key takeaways

• PKI outages are usually governance failures disguised as technical incidents, because inventory and ownership gaps allow certificates to expire or be installed incorrectly.
• The Forrester figures cited by Keyfactor show the scale of the problem, with 18 to 22 incidents a year and an average cost of $100,000 per incident.
• Centralised discovery plus automated renewal and deployment is the control combination that prevents the same outage pattern from repeating.

Key terms

• Certificate lifecycle: The certificate lifecycle is the full sequence of discovery, issuance, deployment, renewal, replacement, and retirement for a digital certificate. In practice, outages happen when one of those steps is handled manually or outside a trusted inventory, leaving security teams unable to prove what is active or who owns it.
• Shadow certificate: A shadow certificate is a certificate issued, installed, or managed outside central governance. It may work for a period of time, but it is effectively invisible to the security programme until it fails, expires, or becomes a compliance problem. Shadow certificates are usually a visibility and ownership issue, not a cryptography issue.
• Cryptographic inventory: A cryptographic inventory is the authoritative record of certificates, keys, and related assets across the environment. It allows teams to answer where assets live, who owns them, and when they expire. Without it, lifecycle controls become reactive, audits take longer, and outages are more likely.

Deepen your knowledge

NHI governance, agentic AI identity, and machine identity security are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are responsible for identity security strategy or NHI governance in your organisation, it is worth exploring.

This post draws on content published by Keyfactor: Certificate Outages Are Preventable: Reduce PKI Risk. Read the original.