What is CVE-2021-21975?

CVE-2021-21975 is a high-severity vulnerability in VMware Cloud Foundation, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.5/10. Published 2021-03-31.

How severe is CVE-2021-21975?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2021-21975 known to be exploited?

Yes. CVE-2021-21975 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-01-18), indicating it is being actively exploited. 77 public proof-of-concept repositories are indexed.

SSRF in VMware Cloud Foundation

CVE-2021-21975

Server Side Request Forgery in vRealize Operations Manager API (CVE-2021-21975) prior to 8.4 may allow a malicious actor with network access to the vRealize Operations Manager API can perform a Server Side Request Forgery attack to steal administrative credentials.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2021-03-31 · last modified 2026-10-02.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.780 (99.6th percentile), scored 2026-10-18.

High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.783 · newest: 0.780 · change: -0.003

Affected products

VMware Cloud Foundation — versions 3.0, 3.0.1, 3.0.1.1
VMware Vrealize Operations Manager — versions 7.0.0, 7.5.0, 8.0.0
VMware Vrealize Suite Lifecycle Manager — versions 8.0, 8.0.1, 8.1
VMware Vrealize Operations — versions VMware vRealize Operations prior to 8.4

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-01-18. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-02-01.

Required action: Apply updates per vendor instructions.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

www.vmware.com/security/advisories/VMSA-2021-0004.html (Vendor Advisory)
packetstormsecurity.com/files/162349/VMware-vRealize-Operations-Manager-Server-… (Exploit, VDB Entry, Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2021-21975?: CVE-2021-21975 is a high-severity vulnerability in VMware Cloud Foundation, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.5/10. Published 2021-03-31.
How severe is CVE-2021-21975?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-21975 known to be exploited?: Yes. CVE-2021-21975 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-01-18), indicating it is being actively exploited. 77 public proof-of-concept repositories are indexed.