Vulnerability · Published May 26, 2021 · Assigned by vmware
CVE-2021-21986
Critical 9.8
In plain English
A critical-severity security flaw in VMware vCenter Server and VMware Cloud Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 13.3% (higher than 96% of all known vulnerabilities).
Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)13.3%top 3.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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 Availability plug-ins. A malicious actor with network access to port 443 on vCenter Server may perform actions allowed by the impacted plug-ins without authentication.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | VMware vCenter Server and VMware Cloud Foundation | VMware 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) |