# CVE-2021-21972

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).

- Page: https://www.vulneraibility.com/cve/CVE-2021-21972
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2021-11-17; known ransomware use
- EPSS: 99.87% (percentile 100.0)
- Public exploit code: 2 on Exploit-DB · 1 Metasploit module · 27 GitHub proofs of concept · 1 Nuclei template (first 2021-02-24)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2021-02-23)
- Weakness: CWE-22
- Published: 2021-02-24

## Affected versions

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

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://www.vmware.com/security/advisories/VMSA-2021-0002.html
- [other] http://packetstormsecurity.com/files/161590/VMware-vCenter-Server-7.0-Arbitrary-File-Upload.html
- [other] http://packetstormsecurity.com/files/161695/VMware-vCenter-Server-File-Upload-Remote-Code-Execution.html
- [other] http://packetstormsecurity.com/files/163268/VMware-vCenter-6.5-6.7-7.0-Remote-Code-Execution.html
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21972

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.