VMware ESX EUVD-2026-51107

Exploitation requires administrator-level credentials to the VMware ESX or associated management plane, confirmed by the CVSS PR:H metric. The attack is delivered over the network (AV:N), so physical access is not required, but valid high-privilege account access is a hard prerequisite. The vulnerability is limited to the specific operations that the hypervisor fails to log - not all administrator actions are necessarily affected. Exploitation is further constrained to environments where the logging gap actually matters for detection: if the organization does not rely on ESX audit logs (e.g., relying solely on external controls), the operational impact is negligible. No user interaction is required beyond the administrator themselves performing the operation. Specific configuration settings or deployment modes that trigger versus suppress the logging gap are not documented in available intelligence.

The CVSS 3.1 base score of 2.7 (Low) accurately reflects limited direct technical damage: CVSS vector AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N shows that exploitation requires high privileges (PR:H), produces only low integrity impact (I:L), and has no confidentiality or availability impact. In practical terms, an attacker must already hold VMware administrator credentials - a high bar that significantly constrains the realistic threat population to insider threats and post-breach scenarios where credentials have already been stolen. EPSS data was not provided; given the requirement for administrative access and the low CVSS score, exploitation probability is expected to be very low. No CISA KEV listing and no public proof-of-concept code have been identified, reinforcing low urgency for most organizations. The primary real-world risk is compliance and forensic: environments subject to audit requirements may fail controls if administrator actions can be systematically hidden. For organizations in regulated industries, the compliance risk may outweigh the technical severity score. CPE version ranges use wildcards, meaning the exact affected versions are not bounded by available intelligence - this is a notable data gap.

A rogue or compromised VMware administrator authenticates to the ESX management interface over the network, then invokes specific management-plane operations - such as modifying VM configurations, adjusting network policies, or altering access controls - that are known to bypass the audit logging subsystem. The operations complete successfully but leave no log entry, allowing the actor to cover tracks during or after a broader intrusion. No public proof-of-concept code exists at time of analysis.