CVE-2021-21992

mediumpriority · track · 26EPSS 0.010 · 62 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.98% (62nd) EPSS

CVSS 6.8 · medium

Is it mine?

13 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-26

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.06.8mediumAV:N/AC:L/Au:S/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 8 · impact 6.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.16.5mediumAV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400US

affected products (13)

Products and version ranges known to be affected.

n/a VMware vCenter Server, VMware Cloud Foundation≤ VMware vCenter Server(7.x before 7.0 U2c, 6.7 before 6.7 U3o and 6.5 before 6.5 U3q) and VMware Cloud Foundation (4.x before 4.3 and 3.x before 3.10.2.2)enisa_euvdEU
Broadcom Inc. VMware Cloud Foundation3.0 → 3.10.2.2fstec_bduRU
Broadcom Inc. VMware Cloud Foundation4.0 → 4.3fstec_bduRU
Broadcom Inc. VMware vCenter Server6.5 → 6.5 U3qfstec_bduRU
Broadcom Inc. VMware vCenter Server6.7 → 6.7 U3ofstec_bduRU
Broadcom Inc. VMware vCenter Server7.0 → 7.0 U2cfstec_bduRU
Dell Technologies VxRail4.5.0 → 4.5.463fstec_bduRU
Dell Technologies VxRail4.7.0 → 4.7.536fstec_bduRU
vmware cloud foundation3.0 → 3.10.2.2nvdUScpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:*
vmware cloud foundation4.0 → 4.3nvdUScpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:*
vmware vcenter server= 6.5nvdUScpe:2.3:a:vmware:vcenter_server:*:*:*:*:*:*:*:*
vmware vcenter server= 6.7nvdUScpe:2.3:a:vmware:vcenter_server:*:*:*:*:*:*:*:*
vmware vcenter server= 7.0nvdUScpe:2.3:a:vmware:vcenter_server:*:*:*:*:*:*:*:*

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2021-09-22modified 2026-06-17

references (11)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan