IBM AIX 7.2 and 7.3 nimsh service SSL/TLS protection mechanisms could allow a remote attacker to execute arbitrary commands due to improper process controls.
https://thehackernews.com/2025/03/veeam-and-ibm-release-patches-for-high.html
https://www.theregister.com/2025/03/19/ibm_aix_critical_vulnerabilities/