01 Record
CVE-2021-21986
The vSphere Client (HTML5) contains a vulnerability in a vSphere authentication mechanism for the Virtual SAN Health Check, Site Recovery, vSphere Lifecycle Manager, and VMware Cloud Director
UnratedPUBLISHEDCNA: vmware
CNA base scoreUnratedNo CNA CVSS vector
02 Description
The vSphere Client (HTML5) contains a vulnerability in a vSphere authentication mechanism for the Virtual SAN Health Check, Site Recovery, vSphere Lifecycle Manager, and VMware Cloud Director
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 13.26% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 96.2% 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
- Modified. NVD last modified this record on 2026-06-17.
- 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
- 2021-05-26 14:04Z5 YR AGO
- Last updated
- 2024-08-03 18:30Z2 YR AGO
- Reserved
- 2021-01-04
- Assigning CNA
- vmware
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-306Missing Authentication for Critical FunctionBase
- Data version
- 5.1
- Document digest
- 6642c2a7e97f7e6d1ca852eecfd0219eb3264e19ad0ffacac8e4350b6e39600a
05 Affected products
VendorProductVersionsPlatforms
n/aVMware vCenter Server and VMware Cloud FoundationVMware vCenter Server (7.x before 7.0 U2b, 6.7 before 6.7 U3n, 6.5 before 6.5 U3p) and VMware Cloud Foundation (4.x before 4.2.1, 3.x before 3.10.2.1)—
06 References
- www.vmware.comhttps://www.vmware.com/security/advisories/VMSA-2021-0010.html
- packetstormsecurity.comhttp://packetstormsecurity.com/files/162812/VMware-Security-Advisory-2021-0010.html