critical
10
CWE
306
Advisory Published
Updated

CVE-2021-21986

First published: Wed May 26 2021(Updated: )

The vSphere Client (HTML5) contains a vulnerability in a vSphere authentication mechanism for the Virtual SAN Health Check, Site Recovery, vSphere Lifecycle Manager, and VMware Cloud Director Availability plug-ins. A malicious actor with network access to port 443 on vCenter Server may perform actions allowed by the impacted plug-ins without authentication.

Credit: security@vmware.com

Affected SoftwareAffected VersionHow to fix
VMware vCenter Server=6.5
VMware vCenter Server=6.5-a
VMware vCenter Server=6.5-b
VMware vCenter Server=6.5-c
VMware vCenter Server=6.5-d
VMware vCenter Server=6.5-e
VMware vCenter Server=6.5-f
VMware vCenter Server=6.5-update1
VMware vCenter Server=6.5-update1b
VMware vCenter Server=6.5-update1c
VMware vCenter Server=6.5-update1d
VMware vCenter Server=6.5-update1e
VMware vCenter Server=6.5-update1g
VMware vCenter Server=6.5-update2
VMware vCenter Server=6.5-update2b
VMware vCenter Server=6.5-update2c
VMware vCenter Server=6.5-update2d
VMware vCenter Server=6.5-update2g
VMware vCenter Server=6.5-update3
VMware vCenter Server=6.5-update3d
VMware vCenter Server=6.5-update3f
VMware vCenter Server=6.5-update3k
VMware vCenter Server=6.5-update3n
VMware vCenter Server=6.7
VMware vCenter Server=6.7-a
VMware vCenter Server=6.7-b
VMware vCenter Server=6.7-d
VMware vCenter Server=6.7-update1
VMware vCenter Server=6.7-update1b
VMware vCenter Server=6.7-update2
VMware vCenter Server=6.7-update2a
VMware vCenter Server=6.7-update2c
VMware vCenter Server=6.7-update3
VMware vCenter Server=6.7-update3a
VMware vCenter Server=6.7-update3b
VMware vCenter Server=6.7-update3f
VMware vCenter Server=6.7-update3g
VMware vCenter Server=6.7-update3j
VMware vCenter Server=6.7-update3l
VMware vCenter Server=6.7-update3m
VMware vCenter Server=7.0
VMware vCenter Server=7.0-a
VMware vCenter Server=7.0-b
VMware vCenter Server=7.0-c
VMware vCenter Server=7.0-d
VMware vCenter Server=7.0-update1
VMware vCenter Server=7.0-update1a
VMware vCenter Server=7.0-update1c
VMware vCenter Server=7.0-update1d
VMware vCenter Server=7.0-update2
VMware vCenter Server=7.0-update2a
VMware Cloud Foundation>=3.0<3.10.2.1
VMware Cloud Foundation>=4.0<4.2.1

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-21986?

    CVE-2021-21986 refers to a vulnerability in the vSphere Client (HTML5) authentication mechanism for certain VMware plugins.

  • Which software versions are affected by CVE-2021-21986?

    CVE-2021-21986 affects VMware vCenter Server versions 6.5, 6.7, and 7.0, as well as VMware Cloud Foundation versions 3.x and 4.x.

  • What is the severity of CVE-2021-21986?

    CVE-2021-21986 has a severity rating of 9.8, which is considered critical.

  • How can I fix CVE-2021-21986?

    To fix CVE-2021-21986, it is recommended to upgrade to the latest version of vCenter Server or VMware Cloud Foundation, as specified in the VMware Security Advisory.

  • Where can I find more information about CVE-2021-21986?

    You can find more information about CVE-2021-21986 in the VMware Security Advisory and the Packet Storm Security website.

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