Vulnerability in VMware Cloud Foundation
CVE-2026-59309
VMware vCenter contains an authentication bypass vulnerability in the VMware Directory Service. A malicious actor with network access to vCenter may exploit this issue to bypass authentication and gain unauthorized access to the system.
EPSS: 0.079 (94.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Vmware Cloud Foundation — versions 9.1.x.x, 9.0.x.x, 5.x
- Vmware Telco Cloud Infrastructure — versions 3.0
- Vmware Telco Cloud Platform — versions 5.1.x, 5.0.x, 4.x
- Vmware Vcenter — versions 9.1.x.x, 9.0.x.x, 8.0
- Vmware Vcenter_server — versions 8.0
- Vmware Vsphere Foundation — versions 9.1.x.x, 9.0.x.x
Weakness classification (CWE)
References
- security@vmware.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-59309?
- CVE-2026-59309 is a critical-severity vulnerability in VMware Cloud Foundation, classified under Incorrect Implementation of Authentication Algorithm. CVSS score: 9.8/10. Published 2026-07-30.
- How severe is CVE-2026-59309?
- Critical severity. CVSS v3 base score is 9.8 out of 10.