Enterprise cybersecurity faces a landscape where attacks increasingly combine deception techniques, exploitation of vulnerable software, credential theft and extortion. Reports from the European Union Agency for Cybersecurity (ENISA), Verizon and Microsoft show that protecting an organization takes far more than installing antivirus software: it requires watching identities, keeping systems up to date, controlling external applications and preparing for incident recovery. Data compiled by OpenSecurity.es from these studies helps identify the risks that should be a priority for companies and IT teams.
Enterprise cybersecurity in 30 seconds
- ENISA identified phishing as the initial vector in roughly 60% of the cases in its 2025 threat analysis, followed by vulnerability exploitation at 21.3%.
- Verizon puts software flaw exploitation at 31% of the breaches analyzed in its 2026 report.
- Ransomware remains one of the highest-impact threats, through data encryption, information theft and extortion.
- Artificial intelligence speeds up certain offensive tasks, but it also widens the attack surface when adopted without controls.
- Defense requires phishing-resistant authentication, patch management, verified backups, monitoring and recovery plans.
These figures come from studies with different samples and methodologies, so they should not be added together or read as a single measure of all attacks. They do offer a useful snapshot of current priorities: cybercriminals exploit both technical weaknesses and people’s trust and dependence on external digital services.
From phishing to ransomware: the threats IT teams must watch
Phishing remains a common technique for obtaining credentials, distributing malware or starting an intrusion. Messages can impersonate suppliers, collaboration platforms, storage services or company executives. There are also campaigns that use SMS, phone calls and fake pages to convince victims to disclose information or authorize transactions.
ENISA, in its Threat Landscape 2025, analyzed 4,875 incidents recorded between July 2024 and June 2025. Among the cases where it identified an initial vector, phishing accounted for roughly 60%, while vulnerability exploitation reached 21.3%. The report also warns of the industrialization of these campaigns through services and tools that let attackers launch campaigns without building the entire infrastructure from scratch.
The 2026 picture adds a technical warning. Verizon notes that vulnerability exploitation was the entry point in 31% of the breaches in its 2026 DBIR, ahead of methods based on stolen credentials. The figure reinforces the need to shrink the time between a security patch’s release and its installation on exposed systems.
Ransomware is another of the highest-impact risks. These operations can encrypt servers and workstations, steal documents to threaten their publication, or combine both techniques to increase pressure on the victim. Paying does not guarantee recovering all the files, nor does it necessarily stop the stolen data from being leaked — a shift cloudnews.tech explored when it reported on how data leak-based extortion is emerging as ransomware’s new face.
A defense strategy must cover both the entry point and the consequences of an attack. Email filters and endpoint protection help stop threats, while network segmentation, limited permissions and independent backups reduce the scope of an intrusion.
Artificial intelligence changes the pace of attacks
Generative AI can produce more natural text, translate messages and tailor lures to different targets. It can also help automate reconnaissance, analysis and the development of offensive tools. That lowers certain barriers to entry for attackers, though it doesn’t mean every group uses these capabilities or that every automated attack succeeds.
The Microsoft Digital Defense Report 2025 notes a rise in the scale and efficiency of AI-assisted phishing campaigns. Microsoft reported a 54% click-through rate for AI-automated phishing emails analyzed in the study, compared with 12% for the conventional attempts it compared them against. These are results from the sample studied, not a universal rate that applies to every campaign or company. cloudnews.tech previously reported that one in four cyberattacks already use AI, raising the average breach cost to $6 million.
AI also creates risks inside organizations themselves. Employees may enter customer information, contracts or source code into external tools without knowing how that data will be handled. This practice is often called shadow AI, when AI applications are used without the organization’s authorization or oversight.
The answer isn’t necessarily to ban every AI tool. It’s more useful to define which services are authorized, what data can be entered into them, what permissions connected applications have, and how their actions are logged. Systems that let an AI agent run commands, query databases or use credentials need additional controls, because a mistake or a malicious instruction could have operational consequences.
Vulnerabilities, supply chain and attacks on services
Unpatched systems remain an attractive target. A known vulnerability can enable initial network access, privilege escalation or code execution. That’s why asset inventory and patch management need to be part of routine operations, not something left to occasional reviews.
The challenge is especially complex at organizations that run legacy applications, equipment that can’t easily be taken offline, or services exposed to the internet. Installing updates without planning isn’t enough: critical systems need to be prioritized, real exposure assessed, fixes tested when necessary, and temporary mitigations put in place for equipment that can’t be patched right away.
The supply chain is another route for attacks to spread. A company can keep its own systems reasonably well protected and still suffer the consequences of a compromised supplier, a tampered software dependency, or an external platform that handles essential data.
ENISA has warned in its 2026 analyses that digital dependencies widen the attack surface and can multiply the effects of an incident. For that reason, vendor assessments should cover the access they hold, the data they process, their notification procedures, and the options available if they stop providing service.
Distributed denial-of-service (DDoS) attacks also continue to affect public and private organizations. In these attacks, multiple systems generate traffic to overwhelm a website or service. They don’t always involve an intrusion or data theft, but they can disrupt operations, damage reputation and block access for legitimate customers.
| Risk | Common target | Priority controls |
|---|---|---|
| Phishing and impersonation | Steal credentials, obtain payments or start an intrusion. | Email filters, training and phishing-resistant authentication. |
| Ransomware | Encrypt systems, steal data and extort. | Isolated backups, segmentation, detection and recovery procedures. |
| Vulnerabilities | Access systems or run code. | Asset inventory, patch management and reducing exposed services. |
| Credential theft | Take over accounts and sessions. | MFA, passkeys, session management and least privilege. |
| Supplier risk | Exploit dependencies or external access. | Third-party assessment, permission controls and exit plans. |
| DDoS attacks | Overwhelm applications and networks. | Protection against malicious traffic, redundancy and coordination with the provider. |
| Unsafe AI use | Expose data or grant agents excessive permissions. | Usage policies, access controls, activity logging and human review. |
What measures should a company prioritize
Not every organization has the same budget or the same exposure. A small business can start by securing corporate email, turning on multi-factor authentication, updating its systems and setting up verified backups. An organization with critical services will need to add continuous monitoring, segmentation, response procedures and more demanding recovery testing.
The most useful measures are the ones that reduce specific risks and stay effective over time:
- Protect identities. Turn on MFA for email, administration, storage and remote access. Wherever possible, prioritize passkeys or phishing-resistant security keys.
- Control privileges. Separate administrative accounts from everyday ones, remove unnecessary access, and review permissions periodically.
- Patch with priorities. Keep a system inventory and apply first the fixes that affect exposed assets or actively exploited vulnerabilities.
- Centralize logs and alerts. Keep authentication logs, administrative changes and suspicious activity so incidents can be investigated.
- Prepare recoverable backups. Keep independent copies of data, limit who can modify them, and run restoration tests.
- Define a response plan. Decide who can isolate equipment, revoke credentials, contact suppliers and communicate a breach.
- Review external dependencies. Identify what happens if an identity platform, a cloud provider or a security service stops working.
- Govern AI use. Set what information can be shared with external tools and limit how autonomously agents can act based on risk.
Incident response also needs to be rehearsed. A ransomware simulation, an identity platform outage or losing access to a main supplier helps uncover problems before a real emergency hits. The goal is to check whether the organization can identify the incident, limit its scope and restore priority services within the expected time frame.
Security isn’t measured only by the number of tools purchased or the alerts they generate. What also matters is how long it takes the team to detect an intrusion, how quickly it revokes a compromised access, and its ability to recover data without depending on the attacker.
Frequently asked questions
What is the main cybersecurity threat for businesses in 2026?
There is no single threat for every sector. ENISA highlights phishing and other forms of social engineering, while Verizon puts vulnerability exploitation at 31% of the breaches analyzed in its 2026 report.
How can a company protect itself against ransomware?
It should keep independent backups and test their restoration, update its systems, limit privileges and segment its network. It also needs a procedure to isolate affected equipment and restore critical services first.
What risks does artificial intelligence add to cybersecurity?
AI can help craft more convincing fraudulent messages and speed up certain offensive tasks. Inside companies, using unauthorized tools or agents with excessive permissions can expose information and widen the attack surface.
What should a small business with a limited budget prioritize?
The first steps should be securing email and accounts with MFA, updating systems, using unique passwords, limiting access and keeping verified backups. After that, it’s worth setting up a response plan and reviewing supplier risks.
