2025 First Half Cybersecurity Threats: What Houston Businesses Need to Know
Professional Cybersecurity Guidance Based On Current 2025 Threat Analysis – Comprehensive IT Security Solutions Addressing Current Ransomware And OT Attack Trends
Forescout's mid-year review shows attackers moving past the laptop and into the machinery - operational technology, healthcare, and the network gear at your perimeter. Here is what changed from 2024 and what it means for Houston.
The story of the first half of 2025 is not one new threat - it is that every major category got worse at once, and attackers moved from stealing files to disrupting operations.
Forescout's Vedere Labs watches attacks across IT, operational technology, and connected devices, which makes its mid-year review one of the broadest looks at where risk is actually heading. The 2025H1 Threat Review compares the first six months of 2025 against the same period in 2024, and the deltas are steep. Here is what changed, why ransomware has a new leader, how attacks moved into operational technology and network gear, and why healthcare remains the number-one target.
What Changed From 2024 to 2025?
Nearly every measure Forescout tracks moved sharply in the wrong direction.
Ransomware rose 36%, zero-day exploitation rose 46%, industrial protocol traffic climbed, and new vulnerabilities rose 15% - all in six months.
| Measure (first half) | 2024 | 2025 |
|---|---|---|
| Documented ransomware attacks | Prior-year baseline | 3,649 (+36%) |
| Zero-days exploited before a patch | 43 | 63 (+46%) |
| New vulnerabilities published | Prior-year baseline | 23,581 (+15%) |
| Modbus share of OT communications | 40% | 57% |
| High or critical severity share | - | 45% of new flaws |
No single number here is the whole story - it is the direction of all of them at once. When ransomware, zero-days, and industrial-protocol exposure all climb together, it means attackers are getting faster at finding gaps and broader in what they will target.
Why Does Ransomware Have a New Leader?
Cl0p overtook LockBit, and healthcare stayed the favorite target.
The first half of 2025 saw 3,649 documented ransomware attacks - a 36% jump - with Cl0p emerging as the most active group, overtaking the previously dominant LockBit.
The change at the top matters because it shows how fast this market reshuffles. Take one group down and another steps in within months, often with new tactics. Attacks now hit multiple entry points at once - compromised network servers and email systems - and they are calculated operations aimed at specific weaknesses, not random crime. For a small or mid-size business, a ransomware event is not an inconvenience; one documented healthcare organization needed three weeks to restore normal operations.
Why Are Attackers Targeting Operational Technology?
The shift from stealing data to disrupting physical operations is the big 2025 story.
Opportunistic attacks on operational technology surged in 2025, with Modbus protocol interactions climbing from 40% to 57% of all OT communications as attackers scanned for any exposed industrial system.
These attacks work differently from targeted campaigns: instead of picking a victim, attackers scan the internet for any vulnerable control system and take what they find. Recent incidents hit water treatment facilities and manufacturing plants, and some attackers went as far as trying to reprogram control logic - which can cause physical damage, not just data loss. Iranian hacktivist groups including CyberAv3ngers and APT IRAN intensified operations against critical infrastructure, claiming attacks on petrochemical storage, water utilities, and fuel systems. For Houston businesses in energy, manufacturing, and logistics, that is a direct hit on the equipment that keeps operations running.
The vulnerability side made it worse. Of 23,581 new flaws in six months, 45% were high or critical, and 28 newly exploited vulnerabilities targeted network infrastructure - firewalls, routers, and security appliances that sit at the perimeter with internet exposure. Attackers now prefer the devices that grant persistent access and lateral movement over any single workstation.
Why Is Healthcare Still the Top Target?
Sensitive data, legacy devices, and life-or-death uptime make it the favorite.
Healthcare recorded 341 breaches in the first four months of 2025, affecting nearly 30 million people at an average of 87,388 individuals per breach - the most targeted industry in the review.
Healthcare-targeted attacks have grown more specialized: criminals now hide malware inside fake medical-viewing software to steal data while keeping persistent access, and some attacks specifically target cardiology systems and central monitoring stations. The stakes moved past data theft when one documented case tied a patient death partly to delayed blood-test results caused by a ransomware attack. Hospital networks run on legacy systems and connected medical devices with limited security controls, so a single compromised device can open the whole network - the same interconnection problem that shows up in Houston clinics and specialty practices.
The 2025 numbers tell a story every Houston business owner should hear: the attack moved off your laptop and onto your equipment. If your security plan still stops at the office network and never touches your control systems or your network appliances, it is defending last year's threat.
Security That Covers IT and Operational Technology
CinchOps protects both the office network and the operational technology that runs Houston businesses - continuous monitoring across servers, network appliances, and industrial control systems, with vulnerability management that keeps pace with zero-day exploitation. It is part of our cybersecurity and managed IT services.
Explore CinchOps cybersecurity →How CinchOps Helps Secure Your Business
CinchOps is a managed IT services provider based in Katy, Texas, serving small and mid-sized businesses across the Houston metro area, with security that spans both traditional IT and operational technology.
CinchOps specializes in cybersecurity, network security, managed IT support, VoIP, and SD-WAN for businesses with 10-200 employees. As attacks move into control systems and network gear, the defense has to move with them:
- Continuous monitoring of all network devices. From traditional servers to industrial control systems, so exposure is seen before it is exploited.
- OT-aware network security. Protection designed for the operational technology in energy, healthcare, and manufacturing environments.
- Vulnerability management. Prioritized patching that keeps pace with the rising rate of zero-day exploitation.
- 24/7 threat detection. Around-the-clock oversight that catches suspicious activity before an attack succeeds.
The threats of 2025 do not stop at the edge of your office network, so your defenses cannot either. If your business in Houston or Katy runs operational technology or internet-facing network appliances, talk to CinchOps about a security review that covers all of it.
Frequently Asked Questions
What is the Forescout 2025H1 Threat Review?
It is a mid-year cybersecurity report from Forescout Research - Vedere Labs, published in August 2025. It analyzes vulnerabilities, threat actors, and ransomware across IT, operational technology, and connected devices in the first half of 2025, comparing them against the same period in 2024.
How much did ransomware increase in the first half of 2025?
Ransomware rose 36% year over year, with 3,649 documented attacks in the first half of 2025. Cl0p became the most active group, overtaking LockBit, and healthcare remained the single most-targeted industry across the report.
Why does operational technology matter for my business?
Operational technology runs physical processes - manufacturing lines, building systems, utilities. In 2025, opportunistic attacks on OT surged and Modbus traffic rose from 40% to 57% of OT communications. An OT attack can disrupt operations or cause physical damage, not just steal data.
What is driving the rise in zero-day attacks?
Zero-day exploitation rose 46% in the first half of 2025, with 63 vulnerabilities exploited before patches existed. Attackers increasingly target network infrastructure - firewalls, routers, and appliances - because those devices grant persistent access and lateral movement across a network.
What should a Houston business do about these trends?
Extend security beyond the office network to cover operational technology and internet-facing appliances, keep patching current given the pace of zero-days, and monitor all network devices continuously. A managed IT provider can deliver that coverage without an in-house security team.
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