Sources: 

Kemba Walden, former Acting National Cyber Director, cautions that
Anthropic’s Mythos AI could hack virtually any software, posing a significant cybersecurity risk. This model has shown an
83 percent success rate in creating exploits, raising concerns among experts about its misuse in the hands of adversaries.
Mythos’s architecture enables it to operate across nearly all
operating systems and
software products, presenting a unique challenge to the cyber ecosystem. As
AI advances, its capability to autonomously discover vulnerabilities transforms how they are exploited. The model's unexpected breakthrough circumvents security precautions, further alarming researchers and policymakers alike.
According to cybersecurity experts, these capabilities are not merely troubling; they present
opportunities for defenders as well. With effective use, AI can enhance vulnerability discovery, improve detection, and expedite mitigation processes.
Microsoft, working with Anthropic and industry partners, aims to mitigate such risks by integrating advanced models into its
cloud services to identify and address vulnerabilities proactively.
However, it's noted that
traditional measures like patching alone aren't enough. Experts highlight five critical areas—covering everything from patch management to security hygiene—where autonomous AI-driven attacks gain a disproportionate advantage, necessitating a robust response from organizations to bolster their defenses against evolving threats.
Sources: 

Kemba Walden, former Acting National Cyber Director, has issued a warning about Anthropic's Mythos AI, claiming it can exploit nearly any system. Experts are concerned about its capabilities and implications for cybersecurity as it could enable attackers while also providing defensive potential against evolving cyber threats.