CVE-2021-21975

HIGHNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-01-18), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.5 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
7.5
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 78%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
9.0(high)
EG Risk
96(Attend)
EG Risk 96/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
99.5%
KEV
⚠ Exploited

Published

March 31, 2021

Last Modified

October 30, 2025

Advisory Details (3)

Auto-updated Jun 6, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21975
generic

Support Content Notification - Support Portal - Broadcom support portal

https://www.vmware.com/security/advisories/VMSA-2021-0004.html
generic

Packet Storm

http://packetstormsecurity.com/files/162349/VMware-vRealize-Operations-Manager-Server-Side-Request-Forgery-Code-Execution.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 47× in last 7d / 205× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 360 total refreshes for this CVE.

  1. 2026-07-23 01:57 UTCEG score recompute
  2. 2026-07-22 21:47 UTCEG score recompute
  3. 2026-07-22 21:46 UTCGHSA enrichment
  4. 2026-07-22 19:40 UTCCISA KEV update
  5. 2026-07-22 17:26 UTCEG score recompute
  6. 2026-07-22 17:26 UTCGHSA enrichment
  7. 2026-07-22 14:05 UTCEPSS rescore
  8. 2026-07-22 13:07 UTCGHSA enrichment
  9. 2026-07-22 08:47 UTCGHSA enrichment
  10. 2026-07-22 04:27 UTCGHSA enrichment
  11. 2026-07-22 00:06 UTCGHSA enrichment
  12. 2026-07-21 17:28 UTCEG score recompute
  13. 2026-07-21 17:28 UTCGHSA enrichment
  14. 2026-07-21 15:22 UTCEPSS rescore
  15. 2026-07-21 15:22 UTCEPSS rescore
  16. 2026-07-21 14:37 UTCCISA KEV update
  17. 2026-07-21 13:08 UTCGHSA enrichment
  18. 2026-07-21 08:47 UTCGHSA enrichment
  19. 2026-07-21 04:28 UTCGHSA enrichment
  20. 2026-07-21 00:08 UTCGHSA enrichment
  21. 2026-07-20 19:47 UTCGHSA enrichment
  22. 2026-07-20 15:27 UTCGHSA enrichment
  23. 2026-07-20 11:06 UTCGHSA enrichment
  24. 2026-07-20 06:46 UTCGHSA enrichment
  25. 2026-07-20 02:23 UTCGHSA enrichment
Show 75 more
  1. 2026-07-19 22:03 UTCGHSA enrichment
  2. 2026-07-19 17:43 UTCGHSA enrichment
  3. 2026-07-19 13:23 UTCGHSA enrichment
  4. 2026-07-19 09:04 UTCGHSA enrichment
  5. 2026-07-19 04:44 UTCEG score recompute
  6. 2026-07-19 04:44 UTCGHSA enrichment
  7. 2026-07-19 02:26 UTCEPSS rescore
  8. 2026-07-19 00:24 UTCGHSA enrichment
  9. 2026-07-18 20:05 UTCGHSA enrichment
  10. 2026-07-18 15:45 UTCGHSA enrichment
  11. 2026-07-18 11:25 UTCGHSA enrichment
  12. 2026-07-18 07:05 UTCGHSA enrichment
  13. 2026-07-18 02:45 UTCGHSA enrichment
  14. 2026-07-17 22:25 UTCGHSA enrichment
  15. 2026-07-17 18:05 UTCGHSA enrichment
  16. 2026-07-17 13:45 UTCGHSA enrichment
  17. 2026-07-17 09:26 UTCEG score recompute
  18. 2026-07-17 09:26 UTCGHSA enrichment
  19. 2026-07-17 05:06 UTCGHSA enrichment
  20. 2026-07-17 00:47 UTCGHSA enrichment
  21. 2026-07-16 20:27 UTCGHSA enrichment
  22. 2026-07-16 17:04 UTCCISA KEV update
  23. 2026-07-16 16:07 UTCGHSA enrichment
  24. 2026-07-16 11:46 UTCGHSA enrichment
  25. 2026-07-16 07:27 UTCGHSA enrichment
  26. 2026-07-16 03:07 UTCGHSA enrichment
  27. 2026-07-15 22:47 UTCGHSA enrichment
  28. 2026-07-15 18:27 UTCGHSA enrichment
  29. 2026-07-15 16:55 UTCEPSS rescore
  30. 2026-07-15 16:55 UTCEPSS rescore
  31. 2026-07-15 16:49 UTCCISA KEV update
  32. 2026-07-15 15:04 UTCCISA KEV update
  33. 2026-07-15 14:06 UTCGHSA enrichment
  34. 2026-07-15 09:46 UTCGHSA enrichment
  35. 2026-07-15 05:25 UTCGHSA enrichment
  36. 2026-07-15 01:03 UTCGHSA enrichment
  37. 2026-07-14 20:44 UTCGHSA enrichment
  38. 2026-07-14 18:05 UTCCISA KEV update
  39. 2026-07-14 16:24 UTCGHSA enrichment
  40. 2026-07-14 12:04 UTCGHSA enrichment
  41. 2026-07-14 07:44 UTCGHSA enrichment
  42. 2026-07-14 03:23 UTCGHSA enrichment
  43. 2026-07-13 23:04 UTCGHSA enrichment
  44. 2026-07-13 22:27 UTCEPSS rescore
  45. 2026-07-13 22:27 UTCEPSS rescore
  46. 2026-07-13 18:44 UTCGHSA enrichment
  47. 2026-07-13 17:07 UTCCISA KEV update
  48. 2026-07-13 14:25 UTCGHSA enrichment
  49. 2026-07-13 10:03 UTCGHSA enrichment
  50. 2026-07-13 05:41 UTCGHSA enrichment
  51. 2026-07-13 01:21 UTCGHSA enrichment
  52. 2026-07-12 21:01 UTCGHSA enrichment
  53. 2026-07-12 16:41 UTCGHSA enrichment
  54. 2026-07-12 12:22 UTCGHSA enrichment
  55. 2026-07-12 08:02 UTCGHSA enrichment
  56. 2026-07-12 03:42 UTCGHSA enrichment
  57. 2026-07-11 23:22 UTCGHSA enrichment
  58. 2026-07-11 19:02 UTCGHSA enrichment
  59. 2026-07-11 14:43 UTCGHSA enrichment
  60. 2026-07-11 10:23 UTCGHSA enrichment
  61. 2026-07-11 06:03 UTCGHSA enrichment
  62. 2026-07-11 01:43 UTCGHSA enrichment
  63. 2026-07-10 21:23 UTCGHSA enrichment
  64. 2026-07-10 17:52 UTCCISA KEV update
  65. 2026-07-10 17:03 UTCGHSA enrichment
  66. 2026-07-10 12:43 UTCGHSA enrichment
  67. 2026-07-10 08:23 UTCGHSA enrichment
  68. 2026-07-10 04:01 UTCGHSA enrichment
  69. 2026-07-09 23:40 UTCGHSA enrichment
  70. 2026-07-09 19:21 UTCGHSA enrichment
  71. 2026-07-09 19:07 UTCEPSS rescore
  72. 2026-07-09 15:01 UTCGHSA enrichment
  73. 2026-07-09 10:39 UTCGHSA enrichment
  74. 2026-07-09 06:16 UTCGHSA enrichment
  75. 2026-07-09 01:56 UTCGHSA enrichment

Publicly available exploits

(9 references)

Working exploit code is in the public domain (1 Metasploit module) (7 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCVulnmachines/VMWare-CVE-2021-21975
    First seen Apr 10, 2021

    VMWare-CVE-2021-21975 SSRF vulnerability

    Open source ↗
  • GitHub PoCrabidwh0re/REALITY_SMASHER
    First seen Apr 6, 2021

    vRealize RCE + Privesc (CVE-2021-21975, CVE-2021-21983, CVE-0DAY-?????)

    Open source ↗
  • GitHub PoCmurataydemir/CVE-2021-21975
    First seen Apr 2, 2021

    [CVE-2021-21975] VMware vRealize Operations Manager API Server Side Request Forgery (SSRF)

    Open source ↗
  • GitHub PoCGuayoyoCyber/CVE-2021-21975
    First seen Apr 1, 2021

    Nmap script to check vulnerability CVE-2021-21975

    Open source ↗
  • GitHub PoCAl1ex/CVE-2021-21975
    First seen Mar 31, 2021

    CVE-2021-21975 vRealize Operations Manager SSRF

    Open source ↗
  • GitHub PoCHenry4E36/VMWare-vRealize-SSRF
    First seen Mar 31, 2021

    VMWare vRealize SSRF-CVE-2021-21975

    Open source ↗
  • GitHub PoCdorkerdevil/CVE-2021-21975
    First seen Mar 31, 2021
    Open source ↗
  • Metasploitexploit/linux/http/vmware_vrops_mgr_ssrf_rce✓ verified
    First seen Mar 30, 2021

    VMware vRealize Operations (vROps) Manager SSRF RCE

    Open source ↗
  • Nucleihttp/cves/2021/CVE-2021-21975.yaml
    First seen Jan 1, 2021

    vRealize Operations Manager API - Server-Side Request Forgery

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2021-21975?
CVE-2021-21975 is a high vulnerability published on March 31, 2021. 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.
When was CVE-2021-21975 disclosed?
CVE-2021-21975 was first published in the National Vulnerability Database on March 31, 2021, with the most recent update on October 30, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-21975 actively exploited?
Yes. CISA added CVE-2021-21975 to the Known Exploited Vulnerabilities catalog on January 18, 2022, affecting VMware vRealize Operations Manager API. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-21975?
CVE-2021-21975 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2021-21975?
CVE-2021-21975 affects VMware vRealize Operations Manager API. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2021-21975?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-21975, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2021-21975

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