Schneier on Security

Claude Sonnet 4.5 can now execute multistage network attacks using only standard open-source tools like Bash and Kali Linux, without requiring custom toolkits. The model successfully replicated the Equifax data breach in simulation by instantly recognizing and exploiting a publicized CVE without iteration. This rapid advancement in AI cyber capabilities emphasizes the critical importance of prompt patching and security fundamentals, as AI agents can now autonomously leverage known vulnerabilities faster than previous generations.