CVE-2026-21755

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-08-24. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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

HCL Hive is affected by a missing rate limit which could allow an attacker unauthorized access via brute-force or credential stuffing attacks, or cause a denial of service.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
39(Track)
EG Risk 39/100SSVC: Track

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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

August 24, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 24, 2026
No patch confirmed yet.
generic

Security Bulletin: Multiple security vulnerabilities affect HCL Hive - Customer Support

https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0131731

Vendor Advisories for CVE-2026-21755(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 74× 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.

  1. 2026-09-19 03:03 UTCEG score recompute
  2. 2026-09-19 03:03 UTCGHSA enrichment
  3. 2026-09-18 19:27 UTCEPSS rescore
  4. 2026-09-18 05:14 UTCEG score recompute
  5. 2026-09-18 05:14 UTCGHSA enrichment
  6. 2026-09-17 07:24 UTCEG score recompute
  7. 2026-09-17 07:24 UTCGHSA enrichment
  8. 2026-09-16 14:07 UTCEPSS rescore
  9. 2026-09-16 09:27 UTCEG score recompute
  10. 2026-09-16 09:27 UTCGHSA enrichment
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 11:36 UTCEG score recompute
  13. 2026-09-15 11:36 UTCGHSA enrichment
  14. 2026-09-14 13:46 UTCEG score recompute
  15. 2026-09-14 13:46 UTCGHSA enrichment
  16. 2026-09-13 16:47 UTCEPSS rescore
  17. 2026-09-13 15:56 UTCGHSA enrichment
  18. 2026-09-12 18:07 UTCEG score recompute
  19. 2026-09-12 18:07 UTCGHSA enrichment
  20. 2026-09-12 15:01 UTCEPSS rescore
  21. 2026-09-11 20:14 UTCEG score recompute
  22. 2026-09-11 20:14 UTCGHSA enrichment
  23. 2026-09-11 14:52 UTCEPSS rescore
  24. 2026-09-10 22:24 UTCEG score recompute
  25. 2026-09-10 22:24 UTCGHSA enrichment
Show 49 more
  1. 2026-09-10 09:34 UTCEPSS rescore
  2. 2026-09-10 00:34 UTCGHSA enrichment
  3. 2026-09-09 01:31 UTCEG score recompute
  4. 2026-09-09 01:31 UTCGHSA enrichment
  5. 2026-09-08 22:00 UTCEPSS rescore
  6. 2026-09-07 17:14 UTCEG score recompute
  7. 2026-09-07 17:14 UTCGHSA enrichment
  8. 2026-09-07 16:01 UTCEPSS rescore
  9. 2026-09-06 19:24 UTCEG score recompute
  10. 2026-09-06 19:24 UTCGHSA enrichment
  11. 2026-09-06 13:47 UTCEPSS rescore
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-05 21:33 UTCEG score recompute
  14. 2026-09-05 21:33 UTCGHSA enrichment
  15. 2026-09-04 23:44 UTCEG score recompute
  16. 2026-09-04 23:44 UTCGHSA enrichment
  17. 2026-09-04 05:06 UTCEPSS rescore
  18. 2026-09-04 00:52 UTCGHSA enrichment
  19. 2026-09-03 03:02 UTCEG score recompute
  20. 2026-09-03 03:02 UTCGHSA enrichment
  21. 2026-09-02 14:11 UTCEPSS rescore
  22. 2026-09-02 05:11 UTCEG score recompute
  23. 2026-09-02 05:11 UTCGHSA enrichment
  24. 2026-09-01 13:53 UTCEPSS rescore
  25. 2026-09-01 07:19 UTCEG score recompute
  26. 2026-09-01 07:19 UTCGHSA enrichment
  27. 2026-09-01 04:39 UTCEPSS rescore
  28. 2026-08-31 09:29 UTCEG score recompute
  29. 2026-08-31 09:29 UTCGHSA enrichment
  30. 2026-08-30 19:17 UTCEPSS rescore
  31. 2026-08-30 11:39 UTCEG score recompute
  32. 2026-08-30 11:39 UTCGHSA enrichment
  33. 2026-08-30 01:22 UTCEPSS rescore
  34. 2026-08-29 13:46 UTCEG score recompute
  35. 2026-08-29 13:46 UTCGHSA enrichment
  36. 2026-08-28 21:41 UTCEPSS rescore
  37. 2026-08-28 15:53 UTCGHSA enrichment
  38. 2026-08-28 06:39 UTCGHSA enrichment
  39. 2026-08-27 08:48 UTCEG score recompute
  40. 2026-08-27 08:48 UTCGHSA enrichment
  41. 2026-08-26 14:46 UTCEPSS rescore
  42. 2026-08-26 10:57 UTCEG score recompute
  43. 2026-08-26 10:57 UTCGHSA enrichment
  44. 2026-08-25 13:48 UTCEPSS rescore
  45. 2026-08-25 13:07 UTCEG score recompute
  46. 2026-08-25 13:07 UTCGHSA enrichment
  47. 2026-08-24 15:17 UTCEG score recompute
  48. 2026-08-24 14:21 UTCEG score recompute
  49. 2026-08-24 14:21 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-21755?
CVE-2026-21755 is a medium vulnerability published on August 24, 2026. HCL Hive is affected by a missing rate limit which could allow an attacker unauthorized access via brute-force or credential stuffing attacks, or cause a denial of service.
When was CVE-2026-21755 disclosed?
CVE-2026-21755 was first published in the National Vulnerability Database on August 24, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21755 actively exploited?
CVE-2026-21755 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 87.9% of all scored CVEs.
What is the CVSS score of CVE-2026-21755?
CVE-2026-21755 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-21755?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21755, 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-2026-21755

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