CVE-2021-21992 json
The vCenter Server contains a denial-of-service vulnerability due to improper XML entity parsing.
published 2021-09-22 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9163
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 62%
- public exploits
- 0
- none known
Summary
The vCenter Server contains a denial-of-service vulnerability due to improper XML entity parsing. A malicious actor with non-administrative user access to the vCenter Server vSphere Client (HTML5) or vCenter Server vSphere Web Client (FLEX/Flash) may exploit this issue to create a denial-of-service condition on the vCenter Server host.
Patch / fix
- vmware cloud_foundation 3.10.2.2, 4.3
Exploit prediction
0.98% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:L/Au:S/C:N/I:N/A:C |
Affected products
- n/a VMware vCenter Server, VMware Cloud Foundation
Classification
- Technology feeds
References
-
vmware.com
/security/advisories/VMSA-2021-0020.html
vendor-advisory
Sources
- CVE List CVE-2021-21992
- NVD CVE-2021-21992
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