Mythos Didn't Break Your Security Program. Your Exposure Window Could.
The exposure window is the critical factor turning vulnerabilities into actual breaches.
1What is the Exposure Window?
The exposure window is the time between when a vulnerability becomes exploitable and when teams fix it. This period creates an open opportunity for attackers to cause harm. In 2025, the average eCrime breakout time dropped to 29 minutes, yet organizations could take up to 30 days to remediate critical vulnerabilities.
2The Impact of Mythos
When Anthropic introduced Mythos in April 2025, the industry focused on the volume of new CVEs. However, Mythos didn't create the exposure window—it widened it. In 2025, 48,185 CVEs were disclosed, and this number is expected to rise to 66,000 in 2026. This increase further complicates remediation processes for security teams.
3The Mobilization Problem
The primary reason the exposure window remains open is the mobilization problem. The security team identifies the vulnerability, but remediation is handled by a different team. This handoff takes time due to organizational processes moving at human speed. High and critical vulnerabilities take an average of 55 days to remediate.
4The Role of AI
AI-driven discovery pushes security teams onto a reactive timeline. Vulnerabilities are weaponized within hours, while remediation processes still move at organizational speed. Proactive teams now need to adopt the speed-based metrics used by SOC teams.
5The Blast Radius
The blast radius is the set of critical assets attackers can reach. Not every exposure is dangerous, but attack path analysis shows which vulnerabilities lead to critical assets. This analysis identifies areas to focus on to reduce business risk.
6Future Security Strategy
Closing the exposure window entirely is impossible, but it can be narrowed. Security teams must adopt speed-based metrics to keep up with attackers' pace and focus on reducing the blast radius. This will significantly mitigate business risk.
Original article: The Hacker News — Güvenlik Programınızı Mythos Değil, Maruziyet Süresi Kırdı