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CVE-2021-21972

The vSphere Client (HTML5) contains a remote code execution vulnerability in a vCenter Server...

9.8 CriticalIn KEVPublic exploit

The vSphere Client (HTML5) contains a remote code execution vulnerability in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server. This affects VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

99.9%Up 61.7 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

The vSphere Client (HTML5) contains a remote code execution vulnerability in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server. This affects VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).

Record
CVE-2021-21972
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
10.0 HighAV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness
CWE-22
Updated
2026-11-02
CVE List 9.8

The vSphere Client (HTML5) contains a remote code execution vulnerability in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server. This affects VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).

Record
CVE-2021-21972
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-22
Updated
2026-11-02
EUVDEUVD-2021-9143 9.8

The vSphere Client (HTML5) contains a remote code execution vulnerability in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server. This affects VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).

Record
EUVD-2021-9143
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-c9cr-34rr-8gpr 9.8

The vSphere Client (HTML5) contains a remote code execution vulnerability in a vCenter Server...

The vSphere Client (HTML5) contains a remote code execution vulnerability in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server. This affects VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).

Record
GHSA-c9cr-34rr-8gpr
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-22, CWE-269
Updated
2026-11-02
CISA KEV No score

VMware vCenter Server Remote Code Execution Vulnerability

VMware vCenter Server vSphere Client contains a remote code execution vulnerability in a vCenter Server plugin which allows an attacker with network access to port 443 to execute commands with unrestricted privileges on the underlying operating system.

Record
CVE-2021-21972
Weakness
CWE-23
Updated
2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
PoC in GitHubpsc4re/NSE-scripts2020-03-11
MetasploitVMware vCenter Server Unauthenticated OVA File Upload RCE2021-02-23
PoC in GitHubNS-Sp4ce/CVE-2021-219722021-02-24
PoC in GitHubQmF0c3UK/CVE-2021-21972-vCenter-6.5-7.0-RCE-POC2021-02-24
PoC in GitHubhorizon3ai/CVE-2021-219722021-02-24
PoC in GitHubyaunsky/CVE-2021-219722021-02-24
PoC in GitHubB1anda0/CVE-2021-219722021-02-25
PoC in GitHubL-pin/CVE-2021-219722021-02-25
PoC in GitHubOsyanina/westone-CVE-2021-21972-scanner2021-02-25
PoC in GitHubalt3kx/CVE-2021-219722021-02-25
Show 19 moreShow less
Public exploits
SourceLinkDate
PoC in GitHubconjojo/VMware_vCenter_UNAuthorized_RCE_CVE-2021-219722021-02-25
PoC in GitHubmilo2012/CVE-2021-219722021-02-25
PoC in GitHubrenini/CVE-2021-219722021-02-25
PoC in GitHubGuayoyoCyber/CVE-2021-219722021-02-26
PoC in GitHubJMousqueton/Detect-CVE-2021-219722021-02-27
PoC in GitHubrobwillisinfo/VMware_vCenter_CVE-2021-219722021-02-27
Exploit-DBVMware vCenter Server 7.0 - Unauthenticated File Upload2021-03-01
PoC in GitHubMa1Dong/vcenter_rce2021-03-01
PoC in GitHubd3sh1n/cve-2021-219722021-03-03
PoC in GitHubByZain/CVE-2021-219722021-03-04
PoC in GitHubTaroballzChen/CVE-2021-219722021-03-07
PoC in GitHubmurataydemir/CVE-2021-219722021-04-06
PoC in GitHubpettyhacks/vSphereyeeter2021-04-22
Exploit-DBVMware vCenter Server 7.0 - Remote Code Execution (RCE) (Unauthenticated)2021-06-24
PoC in GitHubhaidv35/CVE-2021-219722021-07-26
PoC in GitHubTAI-REx/CVE-2021-219722021-09-12
PoC in GitHuborangmuda/CVE-2021-219722021-10-03
PoC in GitHubSchira4396/VcenterKiller2022-10-04
NucleiVMware vSphere Client (HTML5) - Remote Code Execution

Plus 2 more. The full list has every link.

History

History
RecordedChangedSources
exploitation
exploits, exploits_more
exploits
first indexedCVE List, EUVD, Exploit-DB, GitHub Advisories, CISA KEV, Metasploit, Nuclei, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-21972 is a critical vulnerability (CVSS 9.8) in Vmware Cloud Foundation, published February 24, 2021. CISA lists it as known to be exploited, since November 3, 2021. EUVD reports exploitation since November 3, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 99.9%, the 99th percentile. No source names a fixed version.

References

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