CVE-2021-21973VulnerabilityPublished 03/07/2022Updated 10/24/2026

CVE-2021-21973: VMware vCenter Server and Cloud Foundation Server Side Request Forgery (SSRF) Vulnerability

Affects VMware vCenter Server and Cloud FoundationSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 03/07/2022
KEV deadline: 03/21/2022
EPSS: 88.0% chance of exploitation in 30 days – higher than 99% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2021-21973 (opens in a new tab)

Description

VMware vCenter Server and Cloud Foundation contain a Server Side Request Forgery (SSRF) vulnerability due to improper validation of URLs in a vCenter Server plugin. This vulnerability allows attackers to perform SSRF attacks that can lead to information disclosure. The vulnerability has been exploited in the wild. No specific affected versions or patch information is provided in the input data.

Summary

CVE-2021-21973 is a Server Side Request Forgery (SSRF) vulnerability in VMware vCenter Server and Cloud Foundation. It arises from improper validation of URLs in a vCenter Server plugin, enabling attackers to cause the server to make unauthorized requests. This can result in information disclosure. The vulnerability has been confirmed as exploited in the wild. No vendor advisory or patch details are included in the provided data.

Impact

Exploitation of this SSRF vulnerability can lead to unauthorized information disclosure from the affected VMware vCenter Server or Cloud Foundation environments. The vulnerability has been observed to be exploited in the wild, indicating active threat. No further impact details or ransomware campaign associations are known from the input data.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor VMware advisories for updates and apply any available patches promptly once released.

CVE-2021-21973: VMware vCenter Server and Cloud Foundation Server Side Request Forgery (SSRF) Vulnerability

What to do

Description

Summary

Impact

Mitigation

Weaknesses

References

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 10:42:05 UTC

Weaknesses

References

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