When Anthropic announced it would restrict access to its most capable model, Mythos, the reason was blunt: the system was powerful enough that it could be used to find and exploit security gaps in computer networks at a speed defenders have never had to reckon with. Mythos was pointed at open-source software — scanning source code, then chaining seemingly minor issues into full system-takeover vulnerabilities.
The mainframe wasn't the target. But that's exactly why it became the story.
As Tim Hill, VP of Software Engineering at Rocket Software, puts it, the Mythos event was a wake-up call that reached even the closed, proprietary world of the mainframe:
The security challenge facing enterprises has fundamentally changed. The mainframe is not exempt — and treating it as if it were is the mistake this moment exposes.
Mythos starts from source code. But source code isn't available for most deployed mainframe products, so the risk that matters most lives exactly where source-code scanning can't reach:
of the top 100 banks run on mainframes
in activity flows through mainframes every day
That scale is why regulators have stopped granting mainframe exceptions — and why the era when mainframe teams could simply tell auditors to trust them is over.
Mythos is a real step forward, but it's an improvement on one piece of the story, not the whole story. What a complete, modern mainframe security strategy actually looks like, from scanning code in real time to governing patches from discovery to deployment to staying audit-ready, is where the conversation really opens up.
Watch more in the full webinar, where Tim Hill and Tom Schmidt walk through what it takes to close the gaps AI-driven detection leaves wide open.
What Mythos Doesn’t See
Join Tim Hill of Rocket Software and CIO.com's Tom Schmidt for a sharp look at what Mythos misses, and what your strategy can't.
The Ultimate Guide to Mainframe Vulnerability Management
New risks are surfacing as technology evolves, posing challenges that weren’t as significant in the past. Today’s cybercriminals compromise your mainframe’s data security with: