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01 Record

CVE-2026-59309

vCenter authentication-bypass vulnerability

CriticalPUBLISHEDCNA: vmware
CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

02 Description

vCenter authentication-bypass vulnerability

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.61% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 49.0% of scored records. A rank, not a probability.
NVD base score
9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Analyzed. NVD last modified this record on 2026-08-25.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-07-30 12:19Z3 MO AGO
Last updated
2026-07-30 15:08Z3 MO AGO
Reserved
2026-07-04
Assigning CNA
vmware
Record state
PUBLISHED
Severity
Critical (CVSS 9.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-303Incorrect Implementation of Authentication AlgorithmBase
Data version
5.2
Document digest
3c4898ab5e109ef5383dcd23f21e8ed74e6f74da201914c107181c5a071bfdbc

05 Affected products

VendorProductVersionsPlatforms
VMwareCloud Foundation9.1.x.x, 9.0.x.x, 5.x—
VMwarevSphere Foundation9.1.x.x, 9.0.x.x—
VMwarevCenter9.1.x.x to < 9.1.0.0300, 9.0.x.x to < 9.0.2.0100, 8.0 to < 8.0 U3k—
VMwareTelco Cloud Platform5.1.x, 5.0.x, 4.x, 3.0—

06 References