---
title: "CVE-2021-22017: VMware vCenter Server, VMware Cloud… | CubePath"
description: "Rhttproxy as used in vCenter Server contains a vulnerability due to improper implementation of URI normalization. A malicious actor with network access…"
language: en
source: https://cubepath.com/security/cve/CVE-2021-22017
---

# CVE-2021-22017: VMware vCenter Server, VMware Cloud… | CubePath

## 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.

Official description from the CVE record, published by vmware. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-22017)

## Key data

### CVSS 3.1 Medium 5.3

Score published by CISA-ADP in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

| Metric                 | Value     | What it means                                                                       |
| ---------------------- | --------- | ----------------------------------------------------------------------------------- |
| Attack vector          | Network   | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity      | Low       | No special conditions are needed. The attack can be repeated at will.               |
| Privileges required    | None      | No account or privileges are needed.                                                |
| User interaction       | None      | No action from any user is needed.                                                  |
| Scope                  | Unchanged | The impact stays within the vulnerable component.                                   |
| Confidentiality impact | Low       | Limited effect on the secrecy of data.                                              |
| Integrity impact       | None      | No effect on the trustworthiness of data.                                           |
| Availability impact    | None      | No effect on availability.                                                          |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.49177 (49.2% probability)

Percentile

98.9%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog

VMware vCenter Server Improper Access Control

Added to the catalog

Jan 10, 2022

Federal due date

Jan 24, 2022

### CISA assessment as of Jan 29, 2025

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation

Recorded by CISA as active

Automatable

yes

Technical impact

partial

## Affected products

Products listed in the CVE record, as the CNA published them.

- VMware vCenter Server, VMware Cloud Foundation

  - affected: 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

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [vmware.com/security/advisories/VMSA-2021-0020.html](https://www.vmware.com/security/advisories/VMSA-2021-0020.html)

## Timeline

1. ID reserved Jan 4, 2021
2. Record published Sep 23, 2021
3. Added to CISA KEV Jan 10, 2022
4. Record last updated Oct 21, 2025

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:34 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)