Browser Threats Expand Across Enterprise Networks

Why It Matters

Browser‑centric workflows turn web browsers into a critical attack surface, exposing enterprises to credential theft and session hijacking that can bypass traditional defenses. Addressing this risk is essential for protecting SaaS, cloud, and internal applications in remote‑first, BYOD environments.

Key Takeaways

• Browsers now expose 100% of workplace apps, 79% fully browser‑based.
• 82% of IT pros saw browser‑related incidents; 53% rated impact moderate‑high.
• Infostealer campaigns stole 345 million credentials in Nov 2025 alone.
• Session cookie theft reaches up to 10 billion per month, bypassing MFA.

Pulse Analysis

The rapid migration to SaaS, cloud services, and remote work has elevated web browsers from a convenience tool to the central conduit for enterprise operations. NordLayer’s analysis shows that virtually every corporate application can be accessed via a browser, creating a uniform yet vulnerable perimeter. This shift expands the attack surface dramatically, especially in environments that embrace BYOD and flexible device policies. As a result, traditional network defenses—once anchored around perimeter firewalls—are losing relevance, prompting security leaders to rethink protection strategies that focus on the browser itself.

Credential theft and session hijacking have emerged as the most damaging outcomes of this new reality. Infostealer malware can exfiltrate saved passwords, autofill data, and authentication tokens in under ten seconds, feeding threat actors with a steady stream of credentials—345 million in a single month of 2025. Even more alarming, stolen session cookies, estimated at billions each month, grant attackers immediate, authenticated access to email, SaaS platforms, and cloud consoles without triggering MFA prompts. High‑profile breaches like the 2024 Ticketmaster incident illustrate how a single compromised browser session can cascade into a large‑scale compromise, underscoring the need for real‑time session monitoring and revocation capabilities.

Despite the clear danger, many organizations overestimate their security posture. While 73% of surveyed IT leaders claim readiness, less than half have deployed critical browser‑centric controls such as secure web gateways, data loss prevention, or endpoint detection and response. Experts recommend a layered approach: enforce phishing‑resistant MFA (passkeys or hardware keys), block unauthorized extensions, replace built‑in password storage with dedicated managers, and implement robust behavioral analytics to flag anomalous session activity. By tightening visibility into browser behavior across managed and unmanaged devices, enterprises can significantly reduce the risk of credential theft and maintain resilience against evolving web‑based threats.