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SMBs Face Rising AI‑Driven Threats, but Classic Gaps Remain Critical

ESET’s 2026 SMB Cyber Readiness Index shows AI‑powered malware as the top concern, yet most incidents still arise from phishing and unpatched software. Defenders must reinforce basic controls while monitoring emerging AI tactics.

What Happened

In 2026, ESET’s SMB Cyber Readiness Index highlighted that AI‑driven malware is now the top concern for SMBs, especially in North America where 33% of respondents flagged it. Despite this, the majority of incidents still stem from classic vectors such as phishing clicks and unpatched software.

Impact

SMBs across all sectors face higher risk of credential theft, ransomware deployment, and data exfiltration when basic controls are missing. The recent discovery of an AI‑written ransomware prototype in 2025 and the PromptSpy Android malware that uses generative AI for persistence illustrate the evolving threat landscape.

What to Do

Defenders should prioritize:

  • Implement multi‑factor authentication for all remote access.
  • Maintain a rigorous patch management cadence; ensure critical OS and application patches are applied within 48 hours.
  • Deploy advanced email filtering and user training to mitigate phishing.
  • Enable endpoint detection and response (EDR) with behavioral analytics to spot anomalous activity.

Mitigations & Best Practices

While AI can accelerate attacks, proven controls remain effective:

  • Regularly back up critical data and test restore procedures.
  • Segment networks to limit lateral movement.
  • Use threat intelligence feeds to stay ahead of emerging AI‑based tactics.

Outlook

AI will continue to lower the barrier for attackers, but SMBs that close traditional gaps will retain a strong defensive posture.

SMB AI phishing patching malware cyber readiness ESET

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