Is CVE-2021-22017 actively exploited?

Yes. CVE-2021-22017 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-22017 be exploited remotely?

The attack vector of CVE-2021-22017 has not been classified yet.

What is the CVSS score of CVE-2021-22017?

CVE-2021-22017 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-22017

HIGHCISA KEVIN THE WILD

CVE-2021-22017

Published: January 10, 2022

EPSS:74.83%probability of exploitation in 30 daysPercentile:98.8th

Official Description

Rhttproxy as used in vCenter Server contains a vulnerability due to improper implementation of URI normalization.

NVD Source

CISA KEV Advisory

VMware vCenter Server Improper Access Control

Rhttproxy as used in vCenter Server contains a vulnerability due to improper implementation of URI normalization.

Added to KEV: 2022-01-10Federal patch deadline: 2022-01-24

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

Rhttproxy, as used in vCenter Server, has a vulnerability due to improper URI normalization. The high EPSS score of 0.74835 indicates a significant likelihood of exploitation, and its presence in CISA's KEV confirms active exploitation, making this a critical vulnerability for vCenter Server deployments.

This vulnerability is actively being exploited in the wild, as confirmed by its inclusion in CISA's KEV.

Recommended Action

Apply the latest security updates and patches for vCenter Server to address the Rhttproxy vulnerability and ensure proper URI normalization.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-22017 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-22017 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.