Why Shadow AI Is A Bigger Threat Than Claude Mythos

ByTim Keary,

Contributor.

Anthropic’s powerful frontier AI model Claude Mythos, has raised serious concerns about the risks presented by AI-driven vulnerability discovery and exploitation. However, there’s reason to suggest that shadow AI might pose a bigger threat to enterprises in the short term.

While advancements in frontier models like Mythos threaten to accelerate vulnerability discovery, shadow AI leaves hidden entry points in enterprise environments that threat actors can exploit.

According to a survey conducted by WalkMe in 2025, 78% of employees admit to using AI tools that were not approved by their employer. At the same time, the number of ungoverned tools has skyrocketed, with Reco finding that organizations average 269 shadow AI tools per 1,000 employees.