The Silent, Deadly Cyber Threat That’s Often Overlooked: Alert Fatigue

Alert fatigue in cyber security happens when security analysts become desensitised to the constant stream of alerts from security platforms, cloud environments, endpoint tools, and logs.

The volume is relentless.

The noise is exhausting.

Focus becomes lost.

Managing alerts becomes about clearing admin tasks, rather than proactively protecting against potentially disastrous threats. The result?

• Missed or overlooked threats
• Slower incident response
• Reduced investigation quality
• Analyst burnout
• A weakened security posture

In high profile incidents like the Equifax breach, security professionals have pointed out that overwhelming alert volumes contributed to the inability to follow up on indicators of compromise, underlining how critical good alert management is.

The threat of alert fatigue is nothing new, however. A historic example of this was the Target breach in 2013, where hackers were able to steal the financial information of 40 million customers. Shane Shook, an executive at the cyber security firm Cylance, remarked “They are bombarded with alerts. They get so many that they just don’t respond to everything. It is completely understandable how this happened”.

Celerity’s Managed SIEM eliminates this overwhelm by centralising, prioritising and contextualising alerts for your organisation, effectively triaging threats for your teams, so they can focus on the most pressing priorities.

Often, the uncomfortable truth is yes.

Security teams are overwhelmed by thousands of notifications from their monitoring tools. On average, about 67% of daily alerts cannot be dealt with by security analysts due to an expanding attack surface and limited capacities.

To make matters worse, 1/5 of alerts are false positives. When analysts spend their days sorting noise instead of investigating real incidents, threats slip through, breaches go undetected, and risk quietly grows.

This is exactly why Celerity’s Managed SIEM exists: to take the burden of alert overload off your team and transform chaos into clarity.

Alert fatigue doesn’t usually appear overnight. It builds gradually. Common warning signs include:

• Repetitive false positives
  If the same alerts are repeatedly investigated and closed as false positives, tuning is overdue and your SIEM is likely generating unnecessary noise.
• Analysts feeling overwhelmed or “always on”
  Comments like “I can’t take a break” or visible frustration with alert volume are early indicators that alerting has become unsustainable.
• A growing alert backlog
  When alerts start piling up faster than they can be investigated, it’s a strong sign of overload and reduced efficiency.
• Slower responses to high-severity alerts
  If analysts are buried in low-value alerts, critical incidents can be missed or significantly delayed.
• Inconsistent investigations
  Rushed triage, mistakes, or escalating everything “just in case” often points to fatigue setting in.

Celerity’s Managed SIEM directly addresses these symptoms by ensuring alerts are relevant, prioritised, and supported by expert oversight.

Reducing alert fatigue is about regaining control of the signal, and that starts with the right SIEM strategy. Organisations must:

• Know what you're watching
  Gain total visibility of all logs and data through a unified view.
• Know what you're looking for
  Map out key threats so analysts are aligned on what matters most.
• Make alerts useful
  Alerts should be tuned and contextual, not noisy and excessive.
• Have a plan to respond
  Define clear actions and develop playbooks for repeatable scenarios.
• Keep improving
  Continually review and refine detections, something we do at Celerity using Kaizen principles.

Here are some practical ways to achieve the above:

Outsource to Experts with Managed SIEM

Celerity’s Managed SIEM takes a different approach to reducing alert fatigue.

Rather than relying on out-of-the-box alert severities, we work closely with customers to understand their highest-value assets, threat landscape, and risk tolerance. This allows us to refine and re-prioritise alerting, so severity levels reflect what truly matters within that specific environment, not what a generic vendor's template assumes is important.

Before go-live, we conduct dedicated discovery workshops to build an accurate picture of your environment and define what “normal” behaviour looks like. During onboarding, we hold frequent tuning sessions to identify false positives early, adjust detections as understanding matures, and ensure your SIEM isn’t overwhelmed from day one.

As tuning evolves, we enhance alert fidelity through automation and AI-driven insights, reducing manual workload and giving analysts a richer context.

Our Managed SIEM includes:

• Enriched, contextual alerts
• Threat prioritisation aligned to business risk
• Tailored reporting and dashboards
• 24/7 monitoring by expert analysts

Centralise Alerts into a Single Source of Truth

Disparate systems are not just inefficient and time-consuming; these lead to missed context that can allow threats to stay undercover.

Our Managed SIEM offers total visibility into your network, applications, and systems, to uncover hidden threats.

With total visibility, every alert is enhanced with contextual data, including user behaviour and historical patterns.

Automate First-line Triage and Prioritisation

Our AI-powered Managed SIEM allows automation to handle repetitive, low-level tasks, including filtering, grouping, scoring, while humans focus on high-impact threats.

Your team sees fewer alerts, but each one is triaged to ensure its importance.

Add 24/7 Expert Oversight Through Celerity’s SOC

Our security analysts continuously monitor your SIEM environment, validating, and escalating only true threats.

This ensures:

• Faster detection
• Reliable threat assessment
• Reduced analyst burden
• Continuous improvement of rules and detections

Extend Capabilities with MDR or MXDR When Enhanced Response is Needed

If you require hands-on investigation, threat hunting, or support containing threats, Celerity’s MDR and MXDR services extend Managed SIEM into a fully managed detection and response ecosystem.

Alert fatigue doesn’t just waste time and burn out your analysts; it creates real security blind spots.

Celerity’s Managed SIEM gives you:

• Consolidated, centralised visibility
• Fewer but higher-quality alerts
• Automated correlation and enrichment
• 24/7 oversight from expert analysts
• A security team focused on action, not admin

Cut out the noise and sharpen your SOC’s focus, find out more about Managed SIEM here.