Bank of America CEO joins the ranks of the concerned, warning that Mythos is threatening the security of the financial system.

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Bank of America CEO Brian Moynihan has joined the ranks of Wall Street executives, warning about the cybersecurity threat posed to the financial system by Anthropic’s AI model Mythos.

On July 16, Moynihan told Bloomberg TV that AI models like Mythos are significantly increasing the workload and response speed required for financial institutions to protect their systems. He said:

This will bring significant changes in workload, the speed at which these tools affect system vulnerabilities, and how quickly you have to address these issues—we are all working to cope with this.

Bank of America currently has limited access to Mythos, which is being used to test its own systems and share information with peers.

Previously, Wallstreetcn noted that JPMorgan Chase CEO Jamie Dimon issued a warning about the model Wednesday, comparing the widespread public release of the system to “giving ballistic missiles to individuals”, a statement that sparked widespread attention on Wall Street.

Wall Street receives restricted access for defensive testing

Bank of America is one of the Wall Street institutions granted access to Mythos.

Moynihan said the bank is using the model to test its own systems and share findings with peers, while ensuring third-party partners complete corresponding security assessments. He said:

We are making sure third parties do the necessary work and are cooperating with the team.

Anthropic released its Mythos model in a restricted form on April 7 this year.

According to Anthropic, the model excels at discovering software vulnerabilities and represents a significant leap over earlier versions. Test data show that during trials, Mythos independently executed 181 successful exploitations of software vulnerabilities—that is, it discovered and attacked 181 distinct software security gaps without human intervention.

Unlike traditional AI-assisted security tools, Mythos can autonomously complete the entire attack chain from vulnerability discovery to active exploitation, essentially operating like an elite hacker team without guidance. This very feature makes its potential threat far exceed previous industry expectations for AI security risks.

Given the model's capabilities and the risk of potential abuse, Anthropic has not opened Mythos to the public.

Strong Investment Banking Performance; Moynihan Optimistic About M&A Outlook

While issuing a warning about Mythos risks, Bank of America also reported clear resilience in its Q2 results this week.

Wallstreetcn noted that, driven by strong trading and growth in investment banking, the bank’s investment banking revenue rose 47% year-on-year to $2.2 billion.

Moynihan said mergers and acquisitions and related discussions remain “active.” He said:

You see various deals announced every day—covering M&A, strategic initiatives, financing, and all aspects.

The strong performance of the investment banking business provides some support for Bank of America amid rising cybersecurity pressures.

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