HackZoneLabs News
Newsletter

CVE-2021-22017

VMware vCenter Server Improper Access Control

  • Medium 5.3
  • Exploited: added to CISA KEV 10 Jan 2022

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.

Key facts

Published
23 Sep 2021
Last changed
21 Oct 2025
Assigned by
vmware
KEV added
10 Jan 2022
KEV fix due
24 Jan 2022
EPSS
49.177% likely to be exploited in the next 30 days, higher than 98.905% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: yes; Technical impact: partial

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 5.3CVSS 3.1, Mediumfrom CISA (ADP container)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

What to do

  • Apply updates per vendor instructions.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
n/aVMware 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 (affected)

Timeline

  1. 23 Sep 2021 Published
  2. 10 Jan 2022 CVE-2021-22017 added to CISA KEV
  3. 10 Jan 2022 Added to the CISA KEV catalogue

References