CVE-2018-20753

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 2022-04-13), 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
9.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 30%CVSS: 9.8Exploit: NoneExposed: 0

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

Kaseya VSA RMM before R9.3 9.3.0.35, R9.4 before 9.4.0.36, and R9.5 before 9.5.0.5 allows unprivileged remote attackers to execute PowerShell payloads on all managed devices. In January 2018, attackers actively exploited this vulnerability in the wild.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
98.0%
KEV
⚠ Exploited

Published

February 5, 2019

Last Modified

November 7, 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-2018-20753
generic

Deep Dive: Kaseya VSA Mining Payload | Huntress

https://blog.huntresslabs.com/deep-dive-kaseya-vsa-mining-payload-c0ac839a0e88

Data Freshness Timeline

(refreshed 99× in last 7d / 433× 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 551 total refreshes for this CVE.

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

Frequently asked(6)

What is CVE-2018-20753?
CVE-2018-20753 is a critical vulnerability published on February 5, 2019. Kaseya VSA RMM before R9.3 9.3.0.35, R9.4 before 9.4.0.36, and R9.5 before 9.5.0.5 allows unprivileged remote attackers to execute PowerShell payloads on all managed devices. In January 2018, attackers actively exploited this vulnerability in the wild.
When was CVE-2018-20753 disclosed?
CVE-2018-20753 was first published in the National Vulnerability Database on February 5, 2019, with the most recent update on November 7, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-20753 actively exploited?
Yes. CISA added CVE-2018-20753 to the Known Exploited Vulnerabilities catalog on April 13, 2022, affecting Kaseya Virtual System/Server Administrator (VSA). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2018-20753?
CVE-2018-20753 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2018-20753?
CVE-2018-20753 affects Kaseya Virtual System/Server Administrator (VSA). 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-2018-20753?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-20753, 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.

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