Broadcom Releases Security Update to Address Vulnerabilities in VMware ESX, vCenter, Workstation, and Fusion
Security advisory addresses vulnerabilities that could lead to arbitrary code execution, information disclosure, denial-of-service (DoS), authentication bypass, and unauthorised access
Summary
Security advisory addresses vulnerabilities that could lead to arbitrary code execution, information disclosure, denial-of-service (DoS), authentication bypass, and unauthorised access
Affected platforms
The following platforms are known to be affected:
Threat details
Exploitation of CVE-2026-59310
Security researchers have observed exploitation of CVE-2026-59310. Observed successful exploitation attempts involved a threat actor using reverse SSH to maintain access to compromised vCenter systems.
The NHS England National CSOC assesses further exploitation as likely.
Introduction
Broadcom has released security updates to address vulnerabilities in VMware ESX, vCenter, Workstation, and Fusion products.
- CVE-2026-59309 - 'Authentication bypass' vulnerability - CVSSv3 base score: 9.8.
- CVE-2026-59310 - 'Directory traversal' vulnerability - CVSSv3 base score: 9.8.
- CVE-2026-47876 - 'Out-of-bounds write' vulnerability - CVSSv3 base score: 9.8.
- CVE-2026-41703 - 'Out-of-bounds read' vulnerability - CVSSv3 base score: 7.6.
Threat updates
| Date | Update |
|---|---|
| 12 Aug 2026 |
Escalated to High Severity
The following sections have been changed:
|
Remediation advice
Affected organisations must review Broadcom's VMSA-2026-0006 advisory and apply the relevant updates as soon as possible.
Remediation steps
| Type | Step |
|---|---|
| Patch |
Required: Update vCenter to a fixed version. Affected organisations must update VMware vCenter to the latest fixed version available. Note: vCenter is often bundled as a component of VMware Cloud Foundation, vSphere Foundation, Telco Cloud Platform, and Telco Cloud Infrastructure. These vCenter components must also be updated. https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/38017 |
| Patch |
Strongly Recommended: Update all other vulnerable VMware products to the latest version. https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/38017 |
Definitive source of threat updates
CVE Vulnerabilities
Last edited: 12 August 2026 1:17 pm