CVE-2012-6396: Cisco NX-OS on Nexus 7000 series switches does not properly handle certain line-card replacements, which mi...

Security readout for executives and security teams

This issue can let an authenticated remote user make Cisco Nexus 7000 switch software consume memory after certain line-card replacements, if configuration references interfaces that no longer exist on the replacement card. The business risk is network disruption on affected core switching infrastructure, not data theft based on the provided sources. Exposure is likely limited to organizations running Cisco Nexus 7000 switches with affected NX-OS releases and operational workflows involving line-card replacement plus stale or crafted interface references. The attacker must be remotely authenticated according to the CVE description. Treat as a targeted infrastructure availability risk. It is not described as unauthenticated or actively exploited, but Nexus 7000 outages can affect broad network services. Validate exposure and apply Cisco guidance during normal network maintenance windows unless critical systems show signs of memory pressure. Mitigation focus: Review Cisco’s security notice for affected NX-OS releases, fixed versions, and official workarounds.; Prioritize remediation for Nexus 7000 systems supporting critical network paths.; Limit configuration privileges to trusted administrators with a clear operational need..

Prepared

Jun 24, 2026, 12:04 UTC (UTC+00:00)

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