Act
active
VMware vCenter RCE flaw CVE-2026-59310 exploited for reverse SSH backdoor
- Engineer — Act: vCenter is core infrastructure for most enterprise estates and active exploitation is deploying persistent reverse SSH tunnels — patch CVE-2026-59310 immediately and audit vCenter hosts for unexpected outbound SSH connections or new SSH tunnel processes.
- SOC/IR — Act: The campaign’s TTP is specific and huntable: sweep for outbound SSH sessions originating from vCenter server hosts, flag any reverse tunnel tools (socat, plink, autossh) running on hypervisor management nodes since the vulnerability’s disclosure date.
- Leader — Plan: Active exploitation of a critical vCenter RCE means full-estate exposure for organizations running VMware — confirm with engineering this sprint that patching is complete and request a status update before this surfaces in a customer security questionnaire.
- Signals: CVE-2026-59310 — CISA KEV: not listed, EPSS 0.01, public PoC on GitHub
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