Mythos, AI, and why the fundamentals still win

Over the last week, the headlines around Mythos have been hard to ignore — and I've been looking at what this means in practice for reducing risk.

For those who haven't seen it: Mythos is a new AI model that has demonstrated the ability to find previously undiscovered vulnerabilities at scale, including 271 previously undiscovered vulnerabilities identified in Mozilla Firefox alone.

The good news is that strong fundamentals still win. The threat has evolved — however, the response doesn't always need to.

1.  Patch quickly and consistently

New vulnerabilities mean new patches. The organisations that stay protected are the ones with a disciplined, fast patching process across all systems. Where possible, enable auto-updates and make patching a board-visible metric — not just an IT task.

2.  Know your third-party exposure

You can't patch what you don't know, and that extends to your supply chain. Every supplier with access to your systems is part of your attack surface. Know who they are, what software they run, and how rigorously they patch. A managed print provider that hasn't updated its firmware in twelve months is a real risk.

3.  Invest in recovery, not just prevention

Most security conversations focus on keeping attackers out. The better question is: what happens if they get in? Offline, immutable backups enable organisations to recover with minimal impact. This is one of the highest-value, lowest-complexity improvements available.

4.  Have the conversation now, not after an incident

The most dangerous response to a threat like this is paralysis. Talk to your IT team, your security lead, and your board. Understand where you stand against these areas. Every improvement you make reduces your risk. The bar for meaningful improvement is lower than most leaders think.

What this means for professional services firms

Law firms, accountancies, and professional services organisations are consistently among the most targeted sectors — not because their technical defences are weaker, but because of the value of the data they hold and the reputational leverage that gives attackers in an extortion scenario.

Mythos and tools like it lower the barrier for finding new vulnerabilities, which compresses the window between a vulnerability being discovered and it being exploited. That makes the speed of your patching process more important than ever. A firm that patches critical vulnerabilities within 14 days is in a fundamentally different position to one that patches monthly.

The organisations most exposed are those that have relied on the absence of a known exploit as a form of protection. That approach has always been fragile. Tools like Mythos make it more fragile still.

Ultimately, the fundamentals still win — but speed and visibility matter more than ever.

How Secure Pathway can help

If you're unsure how your organisation currently stands on patching cadence, third-party risk management, and backup resilience, a Cyber Security Maturity Assessment is the most efficient way to find out.

Secure Pathway's assessment gives you a clear, prioritised picture of your current security posture — mapped against the NIST Cybersecurity Framework and translated into plain English for leadership. No jargon, no generic recommendations. An honest picture and a practical plan.

Book a free 30-minute call at securepathway.co.uk to discuss where your organisation stands.

Rory Hardyman is the founder of Secure Pathway, a cyber security advisory practice specialising in professional services firms.