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CVE-2021-21985

critical · 9.8Actively exploited

On the CISA Known Exploited Vulnerabilities catalog

Apply updates per vendor instructions.

Added 2021-11-03Remediation due 2021-11-17

A public exploit / detection template exists

Weaponised detection is publicly available, which meaningfully raises real-world risk regardless of CVSS. nuclei-templates →

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.

9.8
CVSS
100.0%
EPSS (exploit prob.)
100th
EPSS percentile
2021-05-26
Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-918CWE-20CWE-470

Affected products

VendorProductAffected versions
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.5
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7
vmwarevcenter_server6.7

Check a specific version with /api/v1/cve/match.

References

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2021-21985