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CVE-2021-21992

MEDIUMCVSS 6.5/10EPSS 0.94%

Last modified

CVE-2021-21992 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.94% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
0.94%

56.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
VmwareCloud Foundation>= 3.0, < 3.10.2.2
VmwareCloud Foundation>= 4.0, < 4.3
VmwareVcenter Server6.5
VmwareVcenter Server6.7
VmwareVcenter Server7.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-21992?
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.
How severe is CVE-2021-21992?
CVE-2021-21992 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.94% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21992?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21992?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST