Critical severity · published May 26, 2021
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…
9.8
CVSS
13.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)13.3% · higher than 96% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VS
vCenter Server · VMware
6.5; 6.5; 6.5; 6.5; 6.5; 6.5; +34 more · source: NVD
CF
Cloud Foundation · Vmware
3.0 before 3.10.2.1; 4.0 before 4.2.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21986
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21986
Third Party Advisory
http://packetstormsecurity.com/files/162812/VMware-Security-Advisory-2021-0010.html
Vendor Advisory
https://www.vmware.com/security/advisories/VMSA-2021-0010.html
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