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Email remains the primary attack vector in 2026, according to Microsoft
By MSB

Email continues to be one of the most vulnerable points within corporate security. This is confirmed by the latest report published by Microsoft, which analyzes the threat landscape during the first quarter of 2026 and reveals a worrying evolution in the tactics used by attackers.

The report highlights that phishing attacks continue to grow, but with a key change: they are now more personalized, harder to detect, and in many cases, powered by artificial intelligence.

Among the observed trends:

• Highly targeted emails (spear phishing)
• Use of more convincing natural language
• More believable corporate spoofing
• Large-scale automated campaigns

These types of attacks seek to exploit the human factor, which remains one of the weakest links in the security chain.

One of the most worrying vectors is BEC (Business Email Compromise), where attackers impersonate executives or vendors to request transfers or access to sensitive information.

According to Microsoft:

• These campaigns are increasingly selective
• They do not always include malware, making them harder to detect
• They rely on advanced social engineering

The economic impact of this type of fraud remains one of the highest in cybercrime.

Although malware-free fraud is growing, email remains a key route for distributing malicious code:

• Attachments with hidden payloads
• Links to compromised sites
• Documents with malicious macros

Attackers combine classic techniques with new strategies to bypass traditional detection systems.

The report also underlines the dual role of artificial intelligence:

• For attackers: improves the quality of deception and automates campaigns
• For defenders: allows detection of patterns, anomalies, and suspicious behavior

This technological “arms race” is redefining the balance between attack and defense.

The message is clear: relying solely on traditional filters is no longer enough.

Key recommendations include:

• Continuous employee training
• Implementing multi-factor authentication (MFA)
• Advanced email monitoring
• Using AI-based solutions for early detection

Despite advances in security, email remains one of the most exploited attack surfaces. Its universality and reliance within organizations make it a difficult target to protect completely.

The Microsoft report leaves a clear conclusion: in 2026, email not only remains relevant in cybersecurity, but it continues to evolve as one of the most effective attack vectors.