CVE-2021-21984Network attack vector

Unauthenticated code execution via unauthorized endpoint

Published May 7, 2021 · Updated Aug 3, 2024

Missing authorization in VMware vRealize Business for Cloud before 7.6.0 allows remote attackers to execute code through a network endpoint. The virtual appliance exposes an unauthorized endpoint without enforcing the access check required before code execution. Network reachability is sufficient; VMware has not disclosed the endpoint path, request format, or execution context, limiting the established consequence to arbitrary code execution on the appliance.

CVSS severity9.8
Critical
EPSS probability1.98%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in VMware vRealize Business for Cloud before 7.6.0 allows remote attackers to execute code through a network endpoint. The virtual appliance exposes an unauthorized endpoint without enforcing the access check required before code execution. Network reachability is sufficient; VMware has not disclosed the endpoint path, request format, or execution context, limiting the established consequence to arbitrary code execution on the appliance.

The record

CVE
CVE-2021-21984
Published
May 7, 2021
Updated
Aug 3, 2024
Vendor
VMware
Product
vRealize Business for Cloud
Classifications
CWE-862, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=VMware vRealize Business for Cloud (7.x prior to 7.6.0)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

VMware · vRealize Business for Cloudversion=VMware vRealize Business for Cloud (7.x prior to 7.6.0)

Published CVSS scores

9.8VMwareCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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