What’s Vulnerable › Vulnerabilities

CVE-2021-22017: VMware vCenter Server Improper Access Control

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2022-01-10
• EPSS: 49.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-23 · updated 2026-06-17

Description

Rhttproxy as used in vCenter Server contains a vulnerability due to improper implementation of URI normalization. A malicious actor with network access to port 443 on vCenter Server may exploit this issue to bypass proxy leading to internal endpoints being accessed.

Affected products

• VMware vCenter Server: 6.7
• VMware vCenter Server, VMware Cloud Foundation: VMware vCenter Server(6.7 before 6.7 U3o and 6.5 before 6.5 U3q) and VMware Cloud Foundation 3.x before 3.10.2.2

References

• https://www.vmware.com/security/advisories/VMSA-2021-0020.html
• https://www.vmware.com/security/advisories/VMSA-2021-0020.html
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22017

Get alerted when CVE-2021-22017 or the next vulnerability affects your stack