CVE-2018-19953

MEDIUMNVD 6.19.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-05-24), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 6.1 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
6.1
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 24%CVSS: 6.1Exploit: NoneExposed: 0

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

If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code. QNAP has already fixed the issue in the following QTS versions. QTS 4.4.2.1231 on build 20200302; QTS 4.4.1.1201 on build 20200130; QTS 4.3.6.1218 on build 20200214; QTS 4.3.4.1190 on build 20200107; QTS 4.3.3.1161 on build 20200109; QTS 4.2.6 on build 20200109.

CVSS v3
6.1
EG Score
9.0(high)
EPSS
97.6%
KEV
⚠ Exploited

Published

October 28, 2020

Last Modified

November 3, 2025

Advisory Details (2)

Auto-updated Jun 13, 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-2018-19953
generic

Multiple Vulnerabilities in File Station - Security Advisory | QNAP

https://www.qnap.com/zh-tw/security-advisory/qsa-20-01

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 101× in last 7d / 427× 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 655 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2018-19953?
CVE-2018-19953 is a medium vulnerability published on October 28, 2020. If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code. QNAP has already fixed the issue in the following QTS versions. QTS 4.4.2.1231 on build 20200302; QTS 4.4.1.1201 on build 20200130; QTS 4.3.6.1218 on build 20200214; QTS 4.3.4.1190 on build…
When was CVE-2018-19953 disclosed?
CVE-2018-19953 was first published in the National Vulnerability Database on October 28, 2020, with the most recent update on November 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-19953 actively exploited?
Yes. CISA added CVE-2018-19953 to the Known Exploited Vulnerabilities catalog on May 24, 2022, affecting QNAP Network Attached Storage (NAS). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2018-19953?
CVE-2018-19953 has a CVSS v3 base score of 6.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2018-19953?
CVE-2018-19953 affects QNAP Network Attached Storage (NAS). 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-2018-19953?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-19953, 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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