CVE-2021-22017 (GCVE-0-2021-22017)
Vulnerability from cvelistv5 – Published: 2021-09-23 12:13 – Updated: 2025-10-21 23:25
VLAI?
CISA KEV
Summary
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.
Severity ?
5.3 (Medium)
CWE
- Rhttpproxy bypass vulnerability
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| n/a | 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
|
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 292a5f4c-3721-4997-8ec0-10bb36a907d9
Exploited: Yes
Timestamps
First Seen: 2022-01-10
Asserted: 2022-01-10
Scope
Notes: KEV entry: VMware vCenter Server Improper Access Control | Affected: VMware / vCenter Server | Description: Rhttproxy as used in vCenter Server contains a vulnerability due to improper implementation of URI normalization. | Required action: Apply updates per vendor instructions. | Due date: 2022-01-24 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-22017
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-23 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | vCenter Server |
| Due Date | 2022-01-24 |
| Date Added | 2022-01-10 |
| Vendorproject | VMware |
| Vulnerabilityname | VMware vCenter Server Improper Access Control |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-02-02 12:28 UTC
| Updated: 2026-02-06 07:17 UTC
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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