Cisco sings Mythos' praises - but doesn't say how many bugs the model uncovered

Bug hunting has become a whole lot more exciting in recent months with both Anthropic and OpenAI touting their latest models (that also happen to be super-scary exploit machines). On Tuesday, as Anthropic announced a fourfold expansion to its Mythos preview program, Cisco jumped into the fray, praising the transformative power of AI - but without disclosing how many bugs the latest frontier models found. Cisco SVP Anthony Grieco in a Tuesday blog said that the advanced AI systems, including Anthropic's Claude Mythos Preview and OpenAI's GPT 5.5-Cyber, scanned 1.8 billion lines of code in eight weeks looking for vulnerabilities in Cisco products - a task that otherwise would have taken the networking giant's advanced security team eight years to accomplish. However, Grieco, who heads Cisco's security and trust organization, didn't say how many flaws Mythos and other frontier models uncovered, or if they have all been fixed. The company also did not respond to The Register's questions about this. Grieco did say that speed is only half the story," calling the real breakthrough" the scale, quality, and impact" of the models' findings. The 1.8 billion lines of code, written in more than 25 different languages, spanned Cisco's portfolio, we're told. Netzilla paired the models with a human-guided harness," and achieved a false positive rate of under 3 percent, Grieco wrote. Rather than focusing on a specific scope for a security evaluation, we can assess entire code bases of a product. It's like switching from a flashlight to a flood light to illuminate a dark room," he said. Because each finding is validated through a hybrid of AI and human expertise, our engineering teams are receiving actionable intelligence rather than a wall of warnings." Meanwhile, Anthropic on Tuesday said it expanded Project Glasswing to about 150 additional organizations, bringing the total partner count to about 200. Project Glasswing is the AI giant's controlled partner program for giving selected orgs access to Claude Mythos Preview. When it announced the new model and partner program in early April, Anthropic limited the preview to about 50 entities, claiming Mythos is so good at finding and exploiting security holes that all hell would break loose and the zombie apocalypse would hit should the model fall into the wrong hands. Since April, these select government agencies and corporate partners - including Cisco - have been using Mythos to find and fix bugs in their own products. Palo Alto Networks, one of the original Project Glasswing partners, said in May that after spending a month using frontier AI models, including Anthropic's Mythos, to scan more than 130 products across its three platforms, it uncovered 26 CVEs representing 75 underlying security issues. For comparison, the cybersecurity giant said it typically discloses fewer than five CVEs per month. At the time, a company exec forecast a narrow three-to-five-month window for organizations to outpace the adversary before AI-driven exploits start to become the new norm." The newly expanded Project Glasswing spans more than 15 countries, and, while an Anthropic spokesperson declined to name them or the new partner companies, it's a safe bet that these are likely Western and/or friendly" nations. So not China and Russia. Rubrik, a data security and management vendor, said that it was among the new Glasswing partners. The expanded list also reportedly includes the Korea Internet and Security Agency (KISA), along with Samsung Electronics, SK hynix, and SK Telecom, among other Korean companies. The group covers several industries that weren't well-represented in our initial cohort, such as power, water, healthcare, communications, and hardware," according to a Tuesday Anthropic blog. And many of the new partners are vendors - companies or nonprofits that maintain codebases that are relied upon by lots of other organizations around the world, including governments." Each new partner must meet Anthropic's security requirements before they gain access to Mythos, the company added. (R)