CVE-2018-19953

CRITICALNVD 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
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 24%CVSS: 6.1Exploit: cisa kev · ssvc active · kev ransomware · epss top5pctExposed: 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)
EG Risk
81(Attend)
EG Risk 81/100SSVC: 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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
24%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

October 28, 2020

Last Modified

August 13, 2026

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 58× in last 7d / 252× 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 908 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2018-19953?
CVE-2018-19953 is a critical 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 August 13, 2026. 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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