2025 Browser Threat Review: Zero-Clicks and KEV Catalog Trends

Zero-Click Exploits Defined 2025's Advanced Threat Landscape

• Zero-click exploits, particularly those targeting messaging apps and browsers, emerged as a premier threat vector in 2025, requiring no user interaction for successful compromise.
• These sophisticated attacks often target vulnerabilities within parsers, compilers, and rendering engines, which are integral components of modern web browsers and communication platforms.
• The rise of zero-click threats necessitates enhanced sandboxing, rigorous memory safety improvements, and consistent security patching across all client-side applications, including web browsers.

Source: Cybersecurity News | Date: December 25, 2025

CISA KEV Catalog Trends 2025: Focus on Exploited Vulnerabilities

• The CISA KEV (Known Exploited Vulnerabilities) catalog experienced a significant increase in entries throughout 2025, underscoring the escalating number of vulnerabilities under active exploitation.
• Many of the 2025 KEV additions were associated with client-side software, notably web browsers and their foundational components, frequently serving as initial access points for attackers.
• Analysis of KEV trends revealed that even well-known, older vulnerabilities remain prime targets for exploitation, emphasizing the critical importance of prompt and comprehensive application of vendor security updates.

Source: The CyberThrone | Date: December 24, 2025

References

1. One Year Of Zero-Click Exploits: What 2025 Taught Us About Modern Malware - Cybersecurity News
2. From Disclosure to Detonation: CISA KEV Catalog Trends 2025 - The CyberThrone