critical Known exploitedREV. 01
CVE-2021-22005VMware vCenter Server — Analytics Service Arbitrary File Upload
The analytics service of VMware vCenter Server accepts a crafted file from anyone who can reach its web port, and that upload turns into code running on the appliance that controls the whole virtual estate.
Read the risk
THE VITAL STATS- CVSS score
- 9.8/ 10 CVSS v3.1
- EPSS probability
- 100% Likelihood of exploitation
- Attack complexity
- Low Conditions needed to exploit
- Known exploited
- Yes — CISA KEV
- CVE published
- 2021-09-23
- Added to KEV
- 2021-11-03
- Exploit published
- Yes
- Confidence
- high
- Kill chain
- initial access
- MITRE ATT&CK
- T1190
- Severity
- critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attacker needsNetwork access to port 443 on the vCenter Server. No credentials needed.
Behind the card
4 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02Vendor advisoryVMware advisory VMSA-2021-0020vmware.com
- 03ExploitPublic file-upload exploitpacketstormsecurity.com
- 04CISACISA Known Exploited Vulnerabilities entrycisa.gov
Field-level provenanceTRACE THE SOURCES +
Which source supports each field, when it was retrieved, and who extracted it.
| Fields | Source | Retrieved | Extractor | Confidence |
|---|---|---|---|---|
| title, summary, cvss, severity, exploitation.attack_complexity, exploitation.prerequisites, exploitation.exploit_available, remediation.patch_available, references | nvd.nist.gov | 2026-08-07 | claude-code | high |
| exploitation.known_exploited, recommended_action | cisa.gov | 2026-08-07 | claude-code | high |
| epss | api.first.org | 2026-08-07 | claude-code | high |
Printing history
THE RECORD- r1Initial base card
First printing. This card has not been reprinted since publication.