Why Some Cyberattacks Bypass Defenses While Others Don’t

Introduction: Why Bypassing Security Systems Has Become the Norm

In 2026, cyberattacks continue to evolve, employing increasingly sophisticated methods to bypass security systems. Why do some attacks successfully penetrate protected networks, while others fail? The answer lies in a combination of technical vulnerabilities, the use of legitimate tools by attackers, and the human factor. Modern attacks are the result of meticulous planning, adaptation, and the use of new technologies such as artificial intelligence (AI).

Main Reasons Behind the Success of Cyberattacks

Today, most successful attacks do not rely on classic brute-force hacking but use complex approaches.

1. Exploiting Infrastructure Vulnerabilities

Experts at Informzashchita have found that 78% of cyberattacks on cyber-physical systems in Russia are linked to remote access to open internet resources without applying complex hacking techniques. This means many organizations fail to close basic entry points, such as neglecting software updates or leaving ports open.

2. Using Legitimate Tools

Modern ransomware in 2026 spreads through legitimate administrative tools and system utilities, making it harder for antivirus programs to detect. Seqrite notes that malicious code is no longer just harmful software but part of a commercial business with multi-stage attack planning.

3. Social Engineering and the Human Factor

Cybercriminals resort to bribing employees and building trust circles to gain access to corporate networks. According to Kaspersky, even seemingly insignificant contacts and friendly relationships can become entry points for attacks.

• 78% of attacks on cyber-physical systems in Russia linked to open access
• 60% increase in attack effectiveness through use of legitimate tools
• 25% of breaches occur via social engineering and employee bribery

Technical Vulnerabilities and Methods of Exploitation

In 2026, many organizations still underestimate the importance of software updates and security system configurations.

Updates and Patches: The Key to Risk Reduction

Failure to apply the latest OS and application updates remains one of the main causes of successful attacks. For example, vulnerabilities in Windows Server 2022 that were fixed in the March 2026 update are still exploited by attackers if patches are not installed.

Passwords and Authentication Methods

Classic brute-force and password spraying remain popular attack methods. According to InfraTech’s corporate blog, spraying attacks often go unnoticed when standard passwords like Qwerty123 are used. Strengthening authentication with multi-factor authentication (MFA) reduces the risk of intrusion.

Use of Artificial Intelligence in Bypassing Security

In 2026, AI is actively used both in offensive and defensive technologies.

Creating Malware Using Neural Networks

Neural networks can generate executable files capable of evading modern antivirus and sandbox systems. This makes threats less visible and increases the chances of successful infiltration. While open AI platforms block generating overtly malicious programs, specialized tools remain accessible to criminals.

Attack Automation and Adaptation

AI allows attackers to quickly identify vulnerable targets and adapt methods in real time, complicating detection systems’ work.

• 30% reduction in development time for new AI-powered malware
• 50% increase in successful attacks using AI in 2026

The Role of Social Engineering and the Human Factor

Technological barriers alone are often insufficient without considering the human element.

Bribery and Trust Relationships

According to Kaspersky’s observations, attackers often gain information through bribing company employees or establishing trust in informal settings.

Phishing and Communication-based Attacks

Phishing emails with carefully crafted messages remain one of the most effective ways to access corporate systems. For example, in June 2026, a major Russian bank suffered a theft of over $200,000 due to an employee clicking on a malicious link.

• Employee bribery
• Phishing and spoofing
• Using trusted communication channels

Modern Security Systems and Their Gaps

Despite technological advances, many security systems have shortcomings.

Limitations of Antivirus Solutions

Antivirus programs often fail to detect modified malware, especially when legitimate tools and AI are used for masking. Corporate antivirus packages start at 10,000 ₽ per device per year, but their effectiveness declines without a comprehensive approach.

Security Architecture Weaknesses

Without a comprehensive architecture that includes network segmentation, access control, and regular audits, even expensive security systems cannot provide adequate protection.

Frequently Asked Questions

Key Takeaways

• Most successful attacks exploit basic vulnerabilities and system misconfigurations.
• Use of legitimate tools complicates detection of malicious activity.
• Social engineering remains a primary infiltration channel.
• AI dramatically changes the landscape of attacks and defense.
• A comprehensive security approach with updates, MFA, and staff training is crucial to risk reduction.

Conclusion

In 2026, cyberattacks bypass defenses by combining technical gaps, use of legitimate tools, and human weaknesses. Modern security systems must address these factors by implementing multi-layered protection, leveraging AI for analysis, and actively training personnel. Only this approach can reduce risks and increase resilience to cyber threats.