Review reviewCritical

CVE-2026-59309

VMware Cloud Foundation, vSphere Foundation, vCenter

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.

CVSS
9.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.30
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 9.8

Vulnerability overview

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.

Affected product and versions

Product
VMware Cloud Foundation, vSphere Foundation, vCenter
Affected versions
>= 9.1.x.x, >= 9.0.x.x, >= 5.x, >= 9.1.x.x < 9.1.0.0300, >= 9.0.x.x < 9.0.2.0100, >= 8.0 < 8.0 U3k, >= 3.0, >= 5.1.x, >= 5.0.x, >= 4.x
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that VMware Cloud Foundation, vSphere Foundation, vCenter and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-303
CVE-2026-59309 — VMware Cloud Foundation, vSphere Foundation, vCenter | SECUFOCUS NOW