CVE-2021-37415

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-12-01), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 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
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 100%CVSS: 9.8Exploit: cisa kev · ssvc active · 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.

Zoho ManageEngine ServiceDesk Plus before 11302 is vulnerable to authentication bypass that allows a few REST-API URLs without authentication.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: 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
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
100%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

September 1, 2021

Last Modified

October 31, 2025

Advisory Details (3)

Auto-updated Sep 3, 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-2021-37415
generic

ServiceDesk Plus On-Premises release notes: ReadMe & updates

https://www.manageengine.com/products/service-desk/on-premises/readme.html#11302
generic

ManageEngine: ITOps, cybersecurity & service management software

https://www.manageengine.com

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 52× in last 7d / 218× 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 713 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2021/CVE-2021-37415.yaml
    First seen Jan 1, 2021

    Zoho ManageEngine ServiceDesk Plus - Authentication Bypass

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2021-37415?
CVE-2021-37415 is a critical vulnerability published on September 1, 2021. Zoho ManageEngine ServiceDesk Plus before 11302 is vulnerable to authentication bypass that allows a few REST-API URLs without authentication.
When was CVE-2021-37415 disclosed?
CVE-2021-37415 was first published in the National Vulnerability Database on September 1, 2021, with the most recent update on October 31, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-37415 actively exploited?
Yes. CISA added CVE-2021-37415 to the Known Exploited Vulnerabilities catalog on December 1, 2021, affecting Zoho ManageEngine ServiceDesk Plus (SDP). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-37415?
CVE-2021-37415 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2021-37415?
CVE-2021-37415 affects Zoho ManageEngine ServiceDesk Plus (SDP). 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-2021-37415?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-37415, 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-2021-37415

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