CVE-2021-21975

CRITICALNVD 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
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 78%CVSS: 7.5Exploit: cisa kev · ssvc active · kev ransomware · Metasploit · epss top5pct · epss high · public exploitExposed: 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(Act)
EG Risk 96/100SSVC: Act

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: Fix now — active exploitation, automatable, high impact.
EPSS PROB
78%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

March 31, 2021

Last Modified

August 12, 2026

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 52× in last 7d / 217× 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 759 total refreshes for this CVE.

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

Frequently asked(6)

What is CVE-2021-21975?
CVE-2021-21975 is a critical 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 August 12, 2026. 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

Explore →

Is Your Infrastructure Affected by CVE-2021-21975?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs