CVE-2015-4259: The Integrated Management Controller on Cisco Unified Computing System (UCS) C servers with software 1.5(3)...

Security readout for executives and security teams

Some Cisco UCS C-Series server management controllers shipped with a shared default SSL certificate. If an attacker can intercept management traffic and knows the private key, they may impersonate the controller and weaken HTTPS protections. This is primarily a management-plane confidentiality and trust issue, not evidence of direct code execution. Exposure is likely limited to organizations with Cisco UCS C-Series servers using affected IMC software versions, especially where IMC HTTPS management is reachable by untrusted networks or users. Treat this as a management-plane hardening item. It is important for environments using affected Cisco UCS C-Series servers, but urgency is lower than active exploitation unless IMC access is broadly reachable. Mitigation focus: Review Cisco advisory 39803 for official fixed versions or certificate guidance.; Inventory Cisco UCS C-Series servers and their IMC software versions.; Restrict IMC management access to trusted administrative networks..

Prepared

Jun 13, 2026, 22:22 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.