CRITICAL

CVE-2026-59309

vCenter authentication-bypass vulnerability

CVSS v3

9.8

CRITICAL

EPSS Score

exploit probability

CISA KEV

No

known exploited

Exploitation

none

SSVC status

Description

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.

Technical details

CVSS v3 Vector
3.1
Published
7/30/2026
Last Modified
7/30/2026

Frequently asked questions

What is 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.

Is CVE-2026-59309 actively exploited?

Active exploitation of CVE-2026-59309 has not been confirmed. The EPSS score is N/A%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-59309?

CVE-2026-59309 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string 3.1.

Is CVE-2026-59309 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.