CVE-2026-41539

MEDIUMNVD 6.16.1—
EchelonGraph scoreHIGH confidence

Score 6.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. NVD baseline CVSS 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.1Exploit: NoneExposed: 0

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

A cross-site scripting (XSS) vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to bypass security mechanisms or read application data.

We have already fixed the vulnerability in the following versions: QTS 5.2.9.3492 build 20260507 and later QuTS hero h5.2.9.3499 build 20260514 and later QuTS hero h5.3.4.3500 build 20260520 and later QuTS hero h6.0.0.3500 build 20260520 and later

CVSS v3
6.1
EG Score
6.1(high)
EPSS
9.1%
KEV
Not listed

Published

June 9, 2026

Last Modified

June 30, 2026

References (1)

Vendor Advisories for CVE-2026-41539(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 20× in last 7d / 96× 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. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-05 15:51 UTCEG score recompute
  6. 2026-07-05 15:51 UTCGHSA enrichment
  7. 2026-07-05 02:30 UTCEPSS rescore
  8. 2026-07-04 15:52 UTCEG score recompute
  9. 2026-07-04 15:52 UTCGHSA enrichment
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-03 15:59 UTCEG score recompute
  12. 2026-07-03 15:59 UTCGHSA enrichment
  13. 2026-07-02 15:35 UTCEG score recompute
  14. 2026-07-02 15:35 UTCGHSA enrichment
  15. 2026-07-01 15:31 UTCEG score recompute
  16. 2026-07-01 15:31 UTCGHSA enrichment
  17. 2026-07-01 15:06 UTCEPSS rescore
  18. 2026-06-30 23:22 UTCEPSS rescore
  19. 2026-06-30 15:46 UTCEG score recompute
  20. 2026-06-30 15:46 UTCGHSA enrichment
  21. 2026-06-30 02:30 UTCNVD updateCVSS v3 → 6.1
  22. 2026-06-30 01:55 UTCMITRE cvelistV5CVSS v3 → 6.3 · CVSS v4 → 6.3
  23. 2026-06-29 14:06 UTCEPSS rescore
  24. 2026-06-29 14:04 UTCEG score recompute
  25. 2026-06-29 14:04 UTCGHSA enrichment
Show 71 more
  1. 2026-06-28 14:20 UTCEG score recompute
  2. 2026-06-28 14:20 UTCGHSA enrichment
  3. 2026-06-28 14:07 UTCEPSS rescore
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-27 14:35 UTCEG score recompute
  6. 2026-06-27 14:35 UTCGHSA enrichment
  7. 2026-06-27 03:08 UTCEPSS rescore
  8. 2026-06-26 14:50 UTCEG score recompute
  9. 2026-06-26 14:50 UTCGHSA enrichment
  10. 2026-06-25 15:00 UTCEG score recompute
  11. 2026-06-25 15:00 UTCGHSA enrichment
  12. 2026-06-25 13:49 UTCEPSS rescore
  13. 2026-06-25 13:49 UTCEPSS rescore
  14. 2026-06-24 15:15 UTCEG score recompute
  15. 2026-06-24 15:15 UTCGHSA enrichment
  16. 2026-06-24 14:05 UTCEPSS rescore
  17. 2026-06-23 21:33 UTCEPSS rescore
  18. 2026-06-23 15:30 UTCEG score recompute
  19. 2026-06-23 15:30 UTCGHSA enrichment
  20. 2026-06-22 14:25 UTCEPSS rescore
  21. 2026-06-22 14:25 UTCEPSS rescore
  22. 2026-06-22 05:26 UTCEG score recompute
  23. 2026-06-22 05:25 UTCGHSA enrichment
  24. 2026-06-21 14:56 UTCEPSS rescore
  25. 2026-06-21 14:56 UTCEPSS rescore
  26. 2026-06-21 01:59 UTCEPSS rescore
  27. 2026-06-21 01:56 UTCEG score recompute
  28. 2026-06-21 01:55 UTCGHSA enrichment
  29. 2026-06-19 23:25 UTCEG score recompute
  30. 2026-06-19 23:25 UTCGHSA enrichment
  31. 2026-06-19 19:25 UTCEPSS rescore
  32. 2026-06-18 23:38 UTCEG score recompute
  33. 2026-06-18 23:38 UTCGHSA enrichment
  34. 2026-06-18 17:52 UTCEPSS rescore
  35. 2026-06-18 17:52 UTCEPSS rescore
  36. 2026-06-17 23:40 UTCEG score recompute
  37. 2026-06-17 23:40 UTCGHSA enrichment
  38. 2026-06-16 23:55 UTCEG score recompute
  39. 2026-06-16 23:55 UTCGHSA enrichment
  40. 2026-06-16 17:52 UTCEPSS rescore
  41. 2026-06-16 00:11 UTCEG score recompute
  42. 2026-06-16 00:10 UTCGHSA enrichment
  43. 2026-06-15 17:49 UTCEPSS rescore
  44. 2026-06-15 00:25 UTCEG score recompute
  45. 2026-06-15 00:25 UTCGHSA enrichment
  46. 2026-06-14 00:40 UTCEG score recompute
  47. 2026-06-14 00:40 UTCGHSA enrichment
  48. 2026-06-13 23:00 UTCEPSS rescore
  49. 2026-06-13 00:56 UTCEG score recompute▼ 2.60
  50. 2026-06-13 00:56 UTCGHSA enrichment
  51. 2026-06-12 23:12 UTCEPSS rescore
  52. 2026-06-12 23:12 UTCEPSS rescore
  53. 2026-06-12 16:12 UTCNVD updateCVSS v3 → 6.1 · severity → MEDIUM
  54. 2026-06-12 11:57 UTCEG score recompute
  55. 2026-06-12 11:57 UTCGHSA enrichment
  56. 2026-06-11 22:59 UTCEG score recompute
  57. 2026-06-11 22:59 UTCGHSA enrichment
  58. 2026-06-11 14:00 UTCEPSS rescore
  59. 2026-06-11 10:01 UTCEG score recompute
  60. 2026-06-11 10:01 UTCGHSA enrichment
  61. 2026-06-10 22:18 UTCEPSS rescore
  62. 2026-06-10 21:03 UTCEG score recompute
  63. 2026-06-10 21:03 UTCGHSA enrichment
  64. 2026-06-10 13:22 UTCEPSS rescore
  65. 2026-06-10 13:22 UTCEPSS rescore
  66. 2026-06-10 08:06 UTCEG score recompute
  67. 2026-06-10 08:06 UTCGHSA enrichment
  68. 2026-06-09 19:08 UTCEG score recompute
  69. 2026-06-09 19:08 UTCGHSA enrichment
  70. 2026-06-09 06:11 UTCEG score recompute
  71. 2026-06-09 06:10 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-41539?
CVE-2026-41539 is a medium vulnerability published on June 9, 2026. A cross-site scripting (XSS) vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to bypass security mechanisms or read application data. We have already fixed the vulnerability in the following versions: QTS…
When was CVE-2026-41539 disclosed?
CVE-2026-41539 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41539 actively exploited?
CVE-2026-41539 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-41539?
CVE-2026-41539 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-41539?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41539, 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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