Medium severity · published Sep 22, 2021
CVE-2021-21992
The vCenter Server contains a denial-of-service vulnerability due to improper XML entity parsing
6.5
CVSS
1%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 62% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VS
vCenter Server · VMware
6.5; 6.5; 6.5; 6.5; 6.5; 6.5; +34 more · source: NVD
CF
Cloud Foundation · Vmware
3.0 before 3.10.2.2; 4.0 before 4.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21992
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21992
Vendor Advisory
https://www.vmware.com/security/advisories/VMSA-2021-0020.html
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