Is CVE-2021-21972 exploited in the wild?

Yes. CVE-2021-21972 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.

How severe is CVE-2021-21972?

Critical severity, with a CVSS score of 9.8, published 3 November 2021.

Which products and versions are affected?

VMware vCenter Server 7.x before 7.0 U1c, 6.7 before 6.7 U3l, 6.5 before 6.5 U3n; VMware Cloud Foundation 4.x before 4.2, 3.x before 3.10.1.2.

Is there a fix for CVE-2021-21972?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2021-21972 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2021-21972?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2021-21972: VMware vCenter Server Remote Code Execution Vulnerability

CVE-2021-21972 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03

The VMware vSphere Client (HTML5) contains a remote code execution vulnerability in a vCenter Server plugin. An unauthenticated attacker with network access to port 443 can exploit this to execute commands with unrestricted privileges on the underlying operating system.

Quick answers

Is CVE-2021-21972 exploited in the wild?: Yes. CVE-2021-21972 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2021-21972?: Critical severity, with a CVSS score of 9.8, published 3 November 2021.
Which products and versions are affected?: VMware vCenter Server 7.x before 7.0 U1c, 6.7 before 6.7 U3l, 6.5 before 6.5 U3n; VMware Cloud Foundation 4.x before 4.2, 3.x before 3.10.1.2.
Is there a fix for CVE-2021-21972?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2021-21972 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2021-21972?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

VMware vCenter Server 7.x before 7.0 U1c, 6.7 before 6.7 U3l, 6.5 before 6.5 U3n
VMware Cloud Foundation 4.x before 4.2, 3.x before 3.10.1.2

Timeline

2021-11-03: disclosed
2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
2021-11-03: exploited: Reported as exploited in the wild in CISA KEV catalog.

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