Securing Business Emails Against Zero-Day Attack

Zero-day attacks that exploit unknown or unaddressed vulnerabilities enable cybercriminals to infiltrate corporate networks and either attack immediately or sit and wait for the optimal time to do so. The majority of zero-day attacks are carried out via email.

Anatomy of a Securing Business Emails Against Zero Day Attack

A zero-day attack typically follows six distinct phases:

Phase 1

Looking for Vulnerabilities

Attackers search for vulnerabilities in code, experiment with popular applications, or purchase vulnerabilities on the black market.

Phase 2

Exploit Code Created

Cybercriminals create a malware program or other technical means to exploit the vulnerability they’ve found or bought.

Phase 3

Affected Systems Are Identified

Threat actors identify systems impacted by this vulnerability using methods such as bots or automated scanners.

Phase 4


Attackers determine the best way to penetrate vulnerable systems, most often leveraging phishing campaigns to do so.

Phase 5


The malicious actors get through the perimeter defenses of an organization or personal device.

Phase 6

Attack Launched

Attackers are now able to execute code remotely on the compromised machine to perform malicious actions such as stealing sensitive data that can be monetized for personal gain.

The Guardian Digital Advantage

Protect your users, your key business assets and your reputation with a multi-layered email protection system that
keeps zero-day attacks out of the inbox.

Safeguards the Inbox against Securing Business Emails Against Zero Day Attacks

Zero-day attacks are becoming increasingly prevalent and problematic for all organizations. Small businesses are at heightened risk, as these companies often have less stringent technological defenses, less awareness of threats and less time and resources to invest in protection. Small businesses have the most to lose, and cyberthieves are readily exploiting these weaknesses in dangerous zero-day attacks.

Guardian Digital keeps SMBs and enterprises alike ahead of the latest zero-day threats identified worldwide with adaptive defenses that are updated in real-time, enabling them to evolve as quickly as these zero-day attacks themselves.


Delivers Complete Zero-Day Protection by Closing Critical Gaps in Native Microsoft 365 & Google Workspace Email Security

Native Microsoft 365 and Google Workspace email protection, which is static and only updated retrospectively, is limited in its ability to detect zero-day threats and prevent the data theft, downtime and reputation damage that are frequently the result of a successful attack.

Guardian Digital EnGarde Cloud Email Security closes the gaps in native Microsoft 365 and Google Workspace email protection with critical additional layers of proactive email defenses that prevent emerging zero-day attacks from infiltrating your employees’ inboxes.

Fortifies IT Resources to Offer Superior Zero-Day Protection

Many businesses - especially SMBs - experience a shortage of cybersecurity resources and expertise, leaving them unprepared to defend against sophisticated zero-day attacks.

Guardian Digital’s expert ongoing system monitoring, maintenance and accessible support provide a remote extension of your IT team, improving your business’s email security posture and maximizing your team’s productivity with reliable, cost-efficient zero-day protection.


Safeguard Your Users, Key Business Assets & Brand Image against Costly Securing Business Emails Against Zero Day Attacks with Guardian Digital EnGarde Cloud Email Security.

Phishing Is Evolving.

Are Your Current Email Defenses
Falling Behind?

Modern phishing scams have introduced a new level of risk for businesses. Attackers are targeting Microsoft 365 and Google Workspace users in increasingly sophisticated campaigns designed to evade built-in security defenses.

Get the Guide


Email Risk in Microsoft 365

is Greater than Ever

What's your strategy for preventing loss of email communication and theft in Microsoft 365? Guardian Digital secures Microsoft 365 against the cost of credential phishing and account takeovers.

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Learn how Piedmont Natural Gas improved their email infrastructure in a secure and cost-effective manner with Guardian Digital to protect against phishing and malware attacks.