CVE-2021-21972
CISA KEVPublished November 3, 2021 · Updated April 3, 2026
high
Official Description+
VMware vCenter Server vSphere Client contains a remote code execution vulnerability in a vCenter Server plugin which allows an attacker with network access to port 443 to execute commands with unrestricted privileges on the underlying operating system.
Affected Products
| Vendor | Product |
|---|---|
| VMware | vCenter Server |
Patch Status
Patch by 2021-11-17
Recommended Actions
- Check if your systems use any of the affected products listed above.
- Apply vendor patches immediately if available.
- This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
- Monitor vendor advisories for updates and additional mitigations.
- Review logs for indicators of compromise related to CVE-2021-21972.