CVE-2021-21985
critical-risk
Published 2021-05-26
The vSphere Client (HTML5) contains a remote code execution vulnerability due to lack of input validation in the Virtual SAN Health Check plug-in which is enabled by default in vCenter Server. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server.
Do I need to act?
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94.4% chance of exploitation in next 30 days
EPSS score — higher than 6% of all CVEs
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10
Critical
NETWORK
/ LOW complexity
Affected Products (20)
Affected Vendors
References (7)
Third Party Advisory
http://packetstormsecurity.com/files/162812/VMware-Security-Advisory-2021-0010.h...
Vendor Advisory
https://www.vmware.com/security/advisories/VMSA-2021-0010.html
Third Party Advisory
http://packetstormsecurity.com/files/162812/VMware-Security-Advisory-2021-0010.h...
Vendor Advisory
https://www.vmware.com/security/advisories/VMSA-2021-0010.html
US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-...
85
/ 100
critical-risk
Severity
32/34 · Critical
Exploitability
27/34 · High
Exposure
26/34 · High