Every exploited vulnerability / VMware
CVE-2021-21973 in VMware vCenter Server and Cloud Foundation: known exploited
Generated from its entry in CISA's catalogue of known exploited vulnerabilities as of 3 November 2026.
Attackers are exploiting CVE-2021-21973 in VMware vCenter Server and Cloud Foundation. CISA has listed it as known exploited since 7 March 2022.
| Product | VMware vCenter Server and Cloud Foundation |
|---|---|
| Known exploited since | 7 March 2022 |
| Ransomware use | Not recorded |
| EU vulnerability database | EUVD-2021-9144 |
| Sources | NVD · CISA KEV |
What it means
Attackers have used this vulnerability in real attacks. An unpatched VMware vCenter Server and Cloud Foundation that can be reached from the internet is exposed to them.
What to do
- Apply the vendor's fix to every system running VMware vCenter Server and Cloud Foundation, starting with those reachable from the internet. Take a system off the internet until it can be fixed.
- Check the system for signs that it was reached before the fix.
How Vardion finds it
Wherever a scan or your imported scanner results find CVE-2021-21973, Vardion names the systems affected and puts the fix at the top of the list.