CVE-2021-21975Known exploitationPublic exploitNetwork attack vector

Administrative credential theft via unauthenticated SSRF

Published Mar 31, 2021 · Updated Aug 12, 2026

Server-side request forgery in VMware vRealize Operations Manager 6.7.0 through 8.4.0 allows remote attackers to steal administrative credentials. The unauthenticated /casa/nodes/thumbprints endpoint fetches an attacker-controlled address and exposes administrative credentials in its outbound Authorization header. Network access to the Manager API is sufficient; the flaw does not itself write files or execute code.

CVSS severity8.6
High
EPSS probability78.29%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in VMware vRealize Operations Manager 6.7.0 through 8.4.0 allows remote attackers to steal administrative credentials. The unauthenticated /casa/nodes/thumbprints endpoint fetches an attacker-controlled address and exposes administrative credentials in its outbound Authorization header. Network access to the Manager API is sufficient; the flaw does not itself write files or execute code.

The record

CVE
CVE-2021-21975
Published
Mar 31, 2021
Updated
Aug 12, 2026
Vendor
VMware
Product
VMware vRealize Operations Manager
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 31, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=VMware vRealize Operations prior to 8.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

VMware · VMware vRealize Operations Managerversion=VMware vRealize Operations prior to 8.4

Published CVSS scores

7.5CISACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.6VMwareCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

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 IPsShadowserver observations through Sep 16, 2026. Gaps indicate unavailable data.
Sep 10, 2026Sep 16, 2026
View daily counts
Reporting dayUnique IPs
Sep 10, 20265
Sep 11, 20262
Sep 12, 2026Unavailable
Sep 13, 2026Unavailable
Sep 14, 20263
Sep 15, 2026Unavailable
Sep 16, 20262
Latest reporting daySep 16, 2026
Latest daily unique IPs2
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

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

Reported exploitation

Technologies

Your stack

See the directory against your own environment.

Your stack

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