Broadcom VMWare ESX Insufficient Logging Vulnerability
Broadcom — VMware ESX
- Added to KEV catalog
- 28 October 2026
- Federal remediation due date
- 11 November 2026
- Weakness classification (CWE)
- CWE-778
AI Breakdown
What it is
Broadcom VMware ESX contains an insufficient logging vulnerability that impacts administrative activity tracking. An attacker who has already obtained administrative access can perform certain operations without generating system logs. This lack of logging allows unauthorized activities to proceed without leaving a standard audit trail.
Why it matters
Because this flaw is listed as actively exploited, it poses an urgent risk to virtualization infrastructure. Although known ransomware campaign use is currently unknown, the capability for attackers to operate stealthily severely undermines detection and forensic investigation efforts.
Recommended action
Apply vendor-supplied mitigations immediately in accordance with CISA BOD 26-04 guidance and forensics triage requirements. IT teams must evaluate the internet exposure of affected assets and follow applicable guidance for cloud services. If vendor mitigations are not available, discontinue using the product to protect your environment.
AI-generated from CISA and NVD data — treat as a starting point, not a substitute for your own risk assessment.
CISA Description
Broadcom VMWare ESX contains an insufficient logging vulnerability that could allow a malicious actor with admin access to perform certain operations without being logged.
Required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Notes
https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/38017 ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-41709
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