Your CISO Just Left. Your detection stack hasn’t been updated since they did. A pentest is cheaper than explaining a breach to the board.
Your CISO resigned last month. They gave the standard two weeks. Wrapped up a few projects. Handed over some documentation. Shook a few hands. Then walked out the door.
And now? The detection stack hasn’t been touched since they left. No one has run a vulnerability scan. No one has reviewed the alert rules. No one has looked at the firewall logs with a critical eye.
Everyone is busy. Everyone assumes someone else is handling it. No one is.
The CISO Departure Gap — What Actually Happens
When a CISO leaves, three things happen — none of them good:
- Institutional knowledge walks out the door. That weird firewall rule? The exception for the legacy system? The false positive that everyone ignores? That was all in their head.
- No one owns security. The CTO is busy with product. The COO is busy with operations. The CEO is busy with investors. Security becomes an orphan.
- Compliance drifts. SOC2, ISO27001, EU AI Act — all those certifications require ongoing monitoring. Without a CISO, things slip.
Meanwhile, your detection stack is aging like milk. Signature updates? Maybe. Rule tuning? Probably not. Alert fatigue? Definitely yes.
What’s Actually In Your Stack (And Why It’s Not Working)
Let’s be honest about what you have:
- SIEM: Ingests logs. Generates alerts. 90% are false positives. No one has tuned it in six months.
- EDR: Runs on endpoints. Catches known malware. Misses everything custom or zero-day.
- Firewall: Blocks obvious badness. Allows everything else. Your rule base is a mess.
- Vulnerability scanner: Ran once. Never again. The report is sitting in someone’s inbox unread.
- Your team: Overworked, under-resourced, and not trained on AI attacks, prompt injection, or cloud misconfigurations.
This stack worked when your CISO was there to tune it. Without them? It’s a collection of expensive noise generators.
What Attackers See When Your CISO Leaves
Attackers are watching. They have tools that scrape LinkedIn. They know when your CISO updates their profile to “Open to Work” or changes their headline to “Former CISO at X.”
Here’s what they see:
- Leadership vacuum = slower response times
- No CISO = no one reviewing alert rules = higher chance their attack slips through
- Compliance drift = expired certificates, unpatched systems, misconfigured buckets
- Team chaos = employees clicking things they shouldn’t
They don’t need a zero-day. They just need you to be disorganized. And right now, you are.
Why a Pentest Is the Right Answer (Right Now)
You can’t hire a new CISO tomorrow. Executive search takes months. Integration takes longer. But you can’t afford to wait.
A penetration test gives you:
- An outside perspective — Someone who doesn’t know your internal politics. Someone who will tell you the truth.
- A vulnerability inventory — Exactly what’s broken, ranked by severity, with step-by-step fixes.
- A risk assessment for your board — “Here’s what we found. Here’s what it would cost if exploited. Here’s what we’re doing about it.”
- A checklist for your next CISO — When they walk in the door, they get a report of everything that needs fixing. No onboarding delay.
“Why didn’t we know about this vulnerability?”
“We didn’t have a CISO.”
“How long was it exposed?”
“Six months.”
“Did anyone test for it?”
“…No.”
That conversation ends with someone getting fired. Don’t let it be you.
What a Pentest Costs vs What a Breach Costs
| Item | Cost |
|---|---|
| Website Automated Pentest | €299 |
| Website Full Manual Pentest | €799 |
| Full Web App Pentest | €1,499 |
| Lite AI Pentest | €750 |
| Full AI Pentest | €3,000 |
| AI Red Team | €5,000 |
| Security Retainer (monthly) | €1,500/month |
| Average data breach cost | €4,100,000+ |
A pentest is 0.007% to 0.12% of the cost of a breach. That’s not an expense. That’s insurance.
What to Do This Week
- Run a vulnerability scan immediately — Find the low-hanging fruit. The open RDP ports. The expired SSL certs. The default credentials.
- Get a manual pentest scheduled — Automated scans miss logic flaws, privilege escalation, and business logic abuse. You need a human.
- Document everything — When your new CISO starts, hand them a report of what was found and what was fixed.
- Present to the board — Don’t wait for a breach to justify security spending. Use the pentest findings as leverage.
I’m not a CISO. I don’t want to be your CISO. But I can:
- Test what’s broken
- Tell you exactly how to fix it
- Provide a report you can hand to your board
- Give your next CISO a roadmap
No long-term contract. No sales pitch. Just a pentest from someone who’s been breaking things for 10+ years.
The Bottom Line
Your CISO left. That’s done. You can’t change it.
But you can control what happens next. You can run a pentest. You can find the vulnerabilities. You can fix them. You can go to your board with data, not excuses.
Or you can do nothing. Wait. Hope. And then explain to your board why a breach happened during the leadership gap.
A pentest is cheaper than that conversation. Much cheaper.
🦞 No CISO? No problem. I’ll tell you what’s broken.
Penetration testing for the leaderless security gap. DM me first. Quick chat. Then we book a call if we’re a fit.
No Calendly. Just a human who breaks things (with permission). Based in The Netherlands 🇳🇱
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