CVE-2024-55956

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 2024-12-17), 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: 94%CVSS: 9.8Exploit: 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.

In Cleo Harmony before 5.8.0.24, VLTrader before 5.8.0.24, and LexiCom before 5.8.0.24, an unauthenticated user can import and execute arbitrary Bash or PowerShell commands on the host system by leveraging the default settings of the Autorun directory.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
84(Attend)
EG Risk 84/100SSVC: 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
Severity98% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
94%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

December 13, 2024

Last Modified

November 4, 2025

Advisory Details (2)

Auto-updated Jun 1, 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-2024-55956
generic Patch Available🔴 Active Exploitation

Cleo Software Actively Being Exploited in the Wild | Huntress

https://www.huntress.com/blog/threat-advisory-oh-no-cleo-cleo-software-actively-being-exploited-in-the-wild

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 34× in last 7d / 200× 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 425 total refreshes for this CVE.

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

Publicly available exploits

(2 references)

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

  • Metasploitexploit/multi/http/cleo_rce_cve_2024_55956✓ verified
    First seen Dec 9, 2024

    Cleo LexiCom, VLTrader, and Harmony Unauthenticated Remote Code Execution

    Open source ↗
  • Nucleihttp/cves/2024/CVE-2024-55956.yaml
    First seen Jan 1, 2024

    Cleo Harmony < 5.8.0.24 - File Upload Vulnerability

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2024-55956?
CVE-2024-55956 is a critical vulnerability published on December 13, 2024. In Cleo Harmony before 5.8.0.24, VLTrader before 5.8.0.24, and LexiCom before 5.8.0.24, an unauthenticated user can import and execute arbitrary Bash or PowerShell commands on the host system by leveraging the default settings of the Autorun directory.
When was CVE-2024-55956 disclosed?
CVE-2024-55956 was first published in the National Vulnerability Database on December 13, 2024, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-55956 actively exploited?
Yes. CISA added CVE-2024-55956 to the Known Exploited Vulnerabilities catalog on December 17, 2024, affecting Cleo Multiple Products. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2024-55956?
CVE-2024-55956 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2024-55956?
CVE-2024-55956 affects Cleo Multiple Products. 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-2024-55956?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-55956, 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-2024-55956

Explore →

Is Your Infrastructure Affected by CVE-2024-55956?

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

Start Free Scan →Browse All CVEs