Manufacturing has now been the most-targeted industry for cyberattacks for four consecutive years — and 2026 hasn’t broken that streak. GuidePoint Security’s Q1 2026 GRIT report found manufacturing held the top spot for ransomware impact, and ZeroFox’s Q2 2026 wrap-up confirmed the same: manufacturing was once again the most frequently hit sector, out of nearly 1,900 ransomware and digital extortion incidents tracked that quarter alone. Check Point’s Manufacturing Threat Landscape 2026 report puts a number on the trend: attacks on the sector are up 56% year-over-year.

This isn’t a blip. It’s the fourth year running manufacturing has topped these rankings, and every analyst tracking it says the same thing: expect it to keep climbing.

The obvious answer is money — attackers know a halted production line bleeds cash by the hour, which makes manufacturers more likely to pay fast. ZeroFox’s own analysis backs this up: manufacturers remain a favorite target precisely because production interruptions become costly so quickly that the pressure to pay outweighs the instinct to hold out.

But the why now has a more structural answer, and it’s the one most best-practices checklists skip: manufacturing environments are colliding two very different worlds that were never designed to share a network.

On one side, there’s aging operational technology — PLCs, HMIs, sensors, and legacy Windows systems running under OEM warranties that can’t be patched, sometimes can’t even be touched, without voiding a service contract. On the other, there’s a growing footprint of third-party access: integrators, OEM service technicians, and contractors who need to reach specific equipment, on specific days, often with system access nobody remembers granting — or revoking. GuidePoint’s research has repeatedly flagged initial access brokers selling entry into manufacturing networks on criminal forums, frequently through exactly this kind of loosely governed remote access.

Put those two things together — devices that can’t be secured the traditional way, and access that isn’t tracked the traditional way — and you get a visibility gap that legacy IT security tools, built for office laptops and managed endpoints, were never designed to close.

Most cybersecurity guidance for manufacturers still reads like it was written for a corporate office network: enforce MFA, patch your endpoints, run awareness training. None of that is wrong, but none of it touches the two things actually driving manufacturing’s place at the top of these rankings.

The real questions worth asking are narrower and more uncomfortable:

These are access control and visibility problems, not patching problems. They require seeing and governing every device and every identity — IT and OT alike — touching the network, including the ones that only show up for a service call. That’s a different discipline than traditional endpoint security, and it’s the one manufacturing’s threat data keeps pointing back to.

None of this means the fundamentals stop mattering — strong authentication, incident response planning, and regular risk assessments are still table stakes. But four straight years at the top of the ransomware rankings is a signal that the fundamentals alone haven’t been enough. The gap attackers are exploiting is structural: OT that can’t be secured the old way, and vendor access that isn’t tracked at all.

Closing that gap starts with a basic question most manufacturers can’t yet answer with confidence: what, exactly, is connected to our network — and who’s allowed to be there?