What Should CISOs Prioritize Today?

It Starts with Browser Security

Guest Author: Suresh Batchu, Co-Founder and COO, Seraphic Security

Enterprise security leaders face an increasingly complex and fragmented threat landscape. The proliferation of Saas applications, remote and hybrid workforces, and an explosion of sophisticated phishing, malware, and insider risks have fundamentally shifted how organizations need to protect their data, users, and assets. Yet in the middle of all this, one element of enterprise security has remained chronically under-protected: the browser.

The corporate browser is no longer just a gateway to the web. It’s the modern endpoint, a window directly into the enterprise’s sensitive systems, data, and workflows. And it’s also one of the easiest vectors for attackers to exploit. Today, CISOs must make browser security a top priority, rethinking their endpoint and network security strategies to account for the unique risks that browsers introduce. Moreover, traditional tools like EDR, VPNs, and even some SASE components can’t fully address the risks.

In this post, we’ll explore why browser security deserves to be at the top of every CISO’s agenda, the threats involved, and how modern security architectures need to evolve to manage this overlooked attack surface.

The Browser: The New Enterprise Frontline

According to Forrester Research [forbes.com], over 80% of employees now perform all or most of their work within a browser. This includes accessing CRM systems, collaboration tools, cloud file storage, finance platforms, HR applications, and sensitive corporate data via a web interface. This centrality makes the browser one of the highest-risk assets in the enterprise.

Unlike managed endpoints or internal networks, browsers are inherently open environments, designed for interoperability, extensibility, and user customization. While that flexibility is great for productivity, it introduces a slew of security and governance challenges. From malicious extensions to phishing websites, from untrusted cloud apps to hidden malware payloads delivered via drive-by downloads, the browser is the perfect place for attackers to bypass traditional defenses and directly engage users in their own digital workspace.

The Browser Threat Landscape

The types of attacks targeting enterprise browsers have grown more advanced and persistent over the past several years. As organizations strengthen their endpoint protection and network controls, attackers increasingly shift to targeting the browser. The following are some key browser-based threats enterprises face today:

• Phishing & Credential Harvesting: Sophisticated, lookalike websites trick users into entering sensitive credentials, bypassing MFA through social engineering or session hijacking techniques.
• Malicious Extensions: Extensions with hidden backdoors, spyware capabilities, or data exfiltration mechanisms can be installed by unsuspecting users, often without security teams noticing.
• Data Leakage: Sensitive data copied to clipboards, pasted into unsecured apps, or exposed through web forms and downloads can evade traditional OLP systems operating at the endpoint or network level.
• Zero-Day Exploits: New vulnerabilities in browser engines and plugins are rapidly weaponized by attackers, often before vendor patches are available.
• Reconnaissance & Fingerprinting: Malicious websites can gather browser meta data, geolocation, and device details to plan targeted attacks or evade detection tools.

And because browsers interact with cloud services and external networks outside of traditional perimeters, these threats often slip past legacy security solutions unnoticed.

How Al Is Elevating Browser Risk

While Al offers powerful tools for defense, it also enables attackers to scale and sophisticate their operations at unprecedented levels. Al is already being used to produce highly convincing phishing content and fake websites tailored to specific individuals, while adaptive malware and intelligent extensions are designed to evade traditional detection methods. Al models also have the capabilities to automate reconnaissance by harvesting browser metadata and behavior patterns in real time, tailoring attacks with precision and stealth. This makes the browser the ideal entry point for Al-enhanced threats.

These AI-enhanced threats are increasingly targeting users at the browser level, where many legacy tools simply have no reach. To effectively respond, CISOs need browser-native security that can operate in real time, analyzing user activity, enforcing policies, and preventing data loss at the moment of interaction. With Al raising both the pace and precision of attacks, the browser has become a critical line of defense that traditional solutions are ill­ equipped to protect.

Why Traditional Security Tools Fall Short

The problem isn’t a lack of security investment. It’s a gap in where and how protections are applied. For example, Endpoint Detection and Response (EDR) solutions are effective at monitoring OS-level processes and file-based threats, but they lack visibility into browser runtime behaviors, active sessions, and client-side web activities. Malicious scripts, compromised extensions, or clipboard-based data theft happening within the browser’s sandbox often go undetected.

Other specialized components such as VPNs or Secure Web Gateways primarily control things like network traffic and access but don’t inspect what happens within browser tabs, extensions, or Saas application sessions. They also can fail to enforce contextual DLP policies once a connection is established. Even some SASE components and Cloud Access Security Brokers (CASBs) rely on API integrations or proxy-based monitoring, which can’t capture client-side events like DOM manipulations, clipboard actions, or browser plugin behaviors in real-time.

The result? An invisible, unprotected attack surface sitting at the heart of enterprise operations.

Why CISOs Must Prioritize Browser Security Today    

The business and technical realities of modern work demand a new security paradigm. Here’s why browser security should be front and center this year:

1. Browsers Are the New Endpoint: The browser has become the de facto operating environment for enterprise users. Any security strategy that overlooks this ignores the primary vector for attacks and data loss.
2. Traditional Controls Don’t Extend to the Browser Runtime: Legacy endpoint, network, and cloud security tools were never designed to monitor or enforce policies within active browser sessions. This leaves a dangerous blind spot.
3. Cloud and Saas Proliferation Increases Exposure: With sensitive data
4. increasingly accessed through third-party cloud services, browser-based protections are essential for real-time policy enforcement, OLP, and threat detection at the point of use.
5. The Rise of Browser-Based Malware and Recon Techniques: Attackers are evolving. From obfuscated JavaScript payloads to evasive phishing sites and malicious browser extensions, browser-native threats require browser-native defenses.
6. Governance and Compliance Demands: Many regulatory frameworks now require demonstrable controls over data access and leakage prevention -something traditional tools alone can’t ensure when activity happens inside the browser.

The Path Forward: Purpose-Built Browser Security

Addressing these risks requires security solutions designed specifically for browser environments. Modern browser security platforms offer capabilities such as in-browser threat detection and extension risk analysis. Equally as important is the ability to properly enforce policy and governance, reducing the possibility of data leaks or content exposure. By bringing visibility and control into the browser itself, CISOs can close a critical security gap and align protections with how work actually happens today.

Final Thoughts

As the digital workplace continues to evolve, the browser will only become more central to enterprise operations, and more attractive to attackers. In 2025, CISOs have a strategic opportunity to reframe browser security not as a niche concern, but as a core pillar of their cybersecurity architecture. It’s time to rethink the endpoint. Because in today’s cloud-first, SaaS-driven, hybrid world, the browser is the endpoint.