'Hackers are exploiting a maximum-severity vulnerability that has the potential to give them complete control over thousands of servers, many of which handle mission-critical tasks inside data centers, the US Cybersecurity and Infrastructure Security Agency is warning. The vulnerability, carrying a severity rating of 10 out of a possible 10, resides in the AMI MegaRAC, a widely used firmware package that allows large fleets of servers to be remotely accessed and managed even when power is unavailable or the operating system isn't functioning. These motherboard-attached microcontrollers, known as baseboard management controllers (BMCs), give extraordinary control over servers inside data centers. Administrators use BMCs to reinstall operating systems, install or modify apps, and make configuration changes to large numbers of servers without physically being on premises and, in many cases, without the servers being turned on. Successful compromise of a single BMC can be used to pivot into internal networks and compromise all other BMCs. CVE-2024-54085, as the vulnerability is tracked, allows for authentication bypasses by making a simple web request to a vulnerable BMC device over HTTP. The vulnerability was discovered by security firm Eclypsium and disclosed in March. The disclosure included proof-of-concept exploit code allowing a remote attacker to create an admin account without providing any authentication. At the time of the disclosure, there were no known reports of the vulnerability being actively exploited. On Wednesday, CISA added CVE-2024-54085 to its list of vulnerabilities known to be exploited in the wild. The notice provided no further details.' -- source: https://arstechnica.com/security/2025/06/active-exploitation-of-ami-manageme... Cheers, Peter