Top Email Security Threats to Look Out For in 2026

Common Email Security Threats

Despite a recent increase in web-based attacks, email remains the most popular initial attack vector. According to Check Point data, 68% of cyberattacks originate from a malicious email. Email is targeted so frequently because it is the primary tool for business communication. It is ubiquitous among organizations of all sizes and regularly used to share sensitive business information. Email attacks are also inexpensive, allowing cybercriminals to scale their attacks and target a large number of organizations quickly and inexpensively. 

Finally, email offers a direct line of communication to employees, enabling attackers to use social engineering to compromise corporate systems through human error rather than technical vulnerabilities in the attack surface. Many of the most common email security threats rely on deception and tricking employees into clicking on suspicious links, downloading infected attachments, or accidentally providing sensitive information. 

These threats include:

• Phishing: Fraudulent emails that impersonate legitimate organizations to steal sensitive information like passwords and bank details.
• Spear Phishing: A targeted form of phishing where the attacker tailors the message to a specific individual or company, often using information gathered online.
• Business Email Compromise (BEC): Cybercriminals impersonate senior executives or business partners to request financial transfers or confidential information.
• Malware Attachments: Emails containing infected attachments, such as PDFs or Word documents, that, when opened, install malicious software on the victim’s computer.
• Spoofing: Attackers forge the sender’s email address to make the message appear as if it’s coming from a trusted source.
• Spam: Unsolicited emails that are often used to spread advertisements or direct users to malicious websites.
• Ransomware: Emails that contain links or attachments that, when clicked, deploy ransomware to encrypt the victim’s files.

While these threats have been around for years, their frequency and sophistication continue to increase, especially with the integration of AI and other advanced technologies.

How AI is Transforming Email Security Threats

The rapid advancement of AI is fundamentally changing the landscape of email security threats. By ingesting and analyzing vast amounts of data, AI is enabling cybercriminals to craft more sophisticated and effective attacks. This shift makes traditional detection techniques increasingly insufficient in preventing new email security threats.

One significant impact is in content generation, where AI-powered systems can create email messages that mimic the tone, style, and context of real-world communications, making them harder for users to identify as malicious.

Beyond content generation, AI can also help attackers optimize their phishing emails by testing variations and learning which ones are most likely to succeed. This allows for a level of precision and adaptability that traditional attacks could not match. With AI, attackers can continuously refine their techniques to get past email filters and better trick unfortunate recipients.

Moreover, AI can automate many different aspects of a phishing campaign, including identifying and gathering data on targets, generating the content, and refining strategies to increase the likelihood of success.

In short, AI is pushing the boundaries of email security threats, making them more dynamic, targeted, and difficult to defend against. These attributes are seen in the top email security threats of 2026.

Top Email Security Threats to Look Out For in 2026

#1. Next-Level Phishing with AI Content Generation.

AI content generation is transforming what attackers have at their disposal when launching phishing campaigns. In the past, phishing emails would use relatively basic techniques to mimic trusted entities. These attacks were often easy to identify with spelling and grammar mistakes or by poor attempts to copy branding or corporate styles. If your organization took Email Security seriously, with email filtering and employee training processes in place, these forms of phishing attack posed only a small risk.

Now, with LLMs, attackers can provide AI with real-world examples of a company’s marketing emails, as well as data from their online presence (company websites, social media, etc.). AI models can train on this information and accurately recreate convincing, believable phishing emails that trick recipients into accidentally providing sensitive business information.

#2. Deepfake-Driven Social Engineering

One of the most disturbing email security threats in 2026 is the use of deepfakes and multimodal content in social engineering attacks. Cybercriminals can use AI to generate convincing audio or video clips of trusted individuals, such as company executives or customers, to manipulate the recipient into taking actions on their behalf. For example, attackers might ask employees to make large financial transfers or share sensitive data, all while appearing to communicate with a trusted voice or face. 

AI’s ability to create hyper-realistic videos and audio is taking social engineering to new levels, making it much harder for recipients to recognize the fraud. To learn more about this threat, download Check Point’s recent AI Security Report that names autonomous and interactive deepfakes as one of the five growing threat categories organizations need to be aware of.

#3. Automating Social Engineering Campaigns

Another top email security risk for 2026 is AI enabling the automation of social engineering campaigns, allowing attackers to run large-scale attacks without significant manual intervention. With AI, attackers can automate everything from mining corporate data and generating content to targeting specific individuals within an organization. AI tools can analyze vast amounts of publicly available data to identify vulnerable targets and create personalized phishing messages at scale.

Automation also enables attackers to continuously refine their methods, analyzing which tactics work best and adjusting their approach to get the best results. This makes it easier to launch and scale sophisticated email attacks. With AI-powered social engineering emails delivered more quickly and efficiently, attackers can reach many more potential victims with minimal human involvement.

#4. AI-Developed Malware in Your Inbox

In 2026, AI is playing a key role in developing and distributing more sophisticated malware via email. AI-driven malware can adapt its behavior based on the victim’s system to evade detection. AI can help attackers test, analyze, and eventually bypass security systems, such as traditional email filters and firewalls, enabling malware to reach its intended target.

Instead of simply spreading a virus or ransomware, AI-powered malware can also be designed to conduct multi-stage attacks, such as stealing credentials, compromising email accounts, and exfiltrating sensitive data. 

#5. Falling Accuracy of Traditional Email Security Filters

Traditional email security filters, such as spam and phishing detection tools, are becoming increasingly ineffective at identifying sophisticated threats as attackers use AI to fine-tune their tactics. Cybercriminals can test their phishing emails, iterating on content and format until they find a version that bypasses detection. This includes the email body and subject line, as well as potentially malicious links or attachments.

As phishing and other social engineering tactics become more refined, relying solely on outdated security tools will leave businesses vulnerable. In 2026, organizations will need to adopt advanced AI-based security systems that can analyze emails in real time and identify threats based on behavior and context, not just keywords or patterns.

Best Practices to Protect Against Emerging Email Security Threats 

The top email security threats in 2026 illustrate how AI is transforming the email landscape. As these threats continue to evolve, staying ahead of them requires both better technology and a deeper understanding of how attackers use AI to exploit email vulnerabilities. 

Below are best practices to help protect against the top email security threats in 2026.

• Adopt AI-Powered Email Security Solutions: Given the role AI plays in enhancing email security, it’s equally important to leverage AI-driven solutions to defend against threats. AI-based email security platforms can analyze patterns, identify unusual activity, and detect threats in real time. This enables adaptive security controls based on context and behavior to more accurately identify malicious emails rather than relying solely on static rules and known threat signatures.
• Implement Advanced Email Authentication Protocols: One of the most effective ways to protect against email spoofing and phishing is to use email authentication protocols. These protocols help ensure that emails are genuinely from the stated sender and not from an attacker impersonating a legitimate organization. Popular protocols include DMARC (Domain-based Message Authentication, Reporting & Conformance), SPF (Sender Policy Framework), and DKIM (DomainKeys Identified Mail).
• Utilizzare l'autenticazione a più fattori (MFA): Many email security threats aim to compromise credentials and take over privileged accounts. An effective way to reduce this risk is to enhance your authentication processes using MFA. Requiring a secondary factor to access employee accounts adds an extra layer of defense and makes it significantly harder to access sensitive emails and other corporate systems without the user and IT team noticing.
• Encrypt Sensitive Email Communications: Ensuring that your sensitive information remains private is a critical aspect of email security programs. With strong encryption in place, you can protect any sensitive information sent via email and guarantee that only approved users have access. This allows organizations to confidently use email and share private data without worrying about interception.
• Educate Employees on the Latest Threats: User training and awareness programs have always been vital to email security. They are ultimately the target of social engineering attacks, and teaching them to spot telltale signs of phishing goes a long way toward minimizing risk. However, as AI increases the sophistication of social engineering attacks, employees need to be updated on the latest tactics utilized by cybercriminals. With extensive employee training programs, you can conduct phishing simulations to highlight what to look for and enforce email security best practices that add safeguards and checks to prevent a small human error from spiraling into a large-scale breach.

Proteggi l'email aziendale e la collaborazione con Check Point

In 2026, protecting against email security threats requires a combination of advanced technology, proactive strategies, and user education. All this and more is available with Workspace Security Email from Check Point. 

With Workspace Security, you can:

• Protect against all email threats, including zero-day exploits and malicious attachments, with industry-leading catch-rates for malware and phishing powered by AI detection engines.
• Extend this protection from email platforms to popular collaboration suites, including SharePoint, Teams, OneDrive, Google Workspace, Slack, and more.
• Get visibility on the flow of sensitive data with comprehensive Data Loss Prevention (DLP) technology.
• Automatically identify and block unauthorized access in real-time while also minimizing false positives.
• Run AI phishing simulations for employees to learn how to respond to the latest email security threats.

Check Point has been recognized as a leader in the field by industry analysts and major enterprise accounts, including the recent 2025 Magic Quadrant Report from Gartner.

To learn more about Check Point’s complete email security platform, fill out this form. A member of our team will get in touch to schedule a walk-through of the solution. We’ll show you how Check Point’s patented technology protects against the latest email security threats in 2026.