Is CVE-2021-21973 actively exploited?

Yes. CVE-2021-21973 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-21973 be exploited remotely?

The attack vector of CVE-2021-21973 has not been classified yet.

What is the CVSS score of CVE-2021-21973?

CVE-2021-21973 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-21973

HIGHCISA KEVIN THE WILD

CVE-2021-21973

Published: March 7, 2022

EPSS:90.34%probability of exploitation in 30 daysPercentile:99.6th

Official Description

VMware vCenter Server and Cloud Foundation Server contain a SSRF vulnerability due to improper validation of URLs in a vCenter Server plugin. This allows for information disclosure.

NVD Source

CISA KEV Advisory

VMware vCenter Server and Cloud Foundation Server Side Request Forgery (SSRF) Vulnerability

VMware vCenter Server and Cloud Foundation Server contain a SSRF vulnerability due to improper validation of URLs in a vCenter Server plugin. This allows for information disclosure.

Added to KEV: 2022-03-07Federal patch deadline: 2022-03-21

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

This vulnerability in VMware vCenter Server and Cloud Foundation Server allows an attacker to gain sensitive information due to improper validation of URLs. The high EPSS score of 0.90336 indicates a very high likelihood of exploitation, and its presence in CISA's KEV confirms it is actively being exploited.

This vulnerability is being actively exploited in the wild, as confirmed by its presence in CISA's Known Exploited Vulnerabilities catalog.

Recommended Action

Review and apply the latest security updates from VMware for vCenter Server and Cloud Foundation Server. Ensure all plugins are from trusted sources and properly configured.

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-2021-21973 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-2021-21973 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.