CVE-2026-19983

HIGHPre-NVD 8.38.3—
EchelonGraph scoreMEDIUM confidence

Score 8.3 from GitHub Security Advisory published 2026-08-17. a secondary CVSS source baseline 8.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.3Exploit: None knownExposed: 0

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

A vulnerability was detected in GL.iNet A1300, AX1800, AXT1800, MT2500, MT3000, MT6000, X3000 and XE3000 4.8.x. This issue affects some unknown processing of the file /usr/bin/gl_nas_sys of the component NAS Command Service. The manipulation results in os command injection. The attack may be launched remotely. Upgrading to version 4.9.0 is capable of addressing this issue. It is suggested to upgrade the affected component. The vendor explains: "After our investigation, we have confirmed that the vulnerability described (...) does indeed exist."

CVSS v3
8.3
EG Score
8.3(medium)
EG Risk
53(Track)
EG Risk 53/100SSVC: Track

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
Severity83% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
69%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 20, 2026

Advisory Details (1)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

CVE-issues/4.0.0/NAS Host-header bypass to unauthenticated root RCE.md at main · gl-inet/CVE-issues · GitHub

https://github.com/gl-inet/CVE-issues/blob/main/4.0.0/NAS%20Host-header%20bypass%20to%20unauthenticated%20root%20RCE.md

Vendor Advisories for CVE-2026-19983(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 111× 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 138 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-19983?
CVE-2026-19983 is a high vulnerability published on August 17, 2026. A vulnerability was detected in GL.iNet A1300, AX1800, AXT1800, MT2500, MT3000, MT6000, X3000 and XE3000 4.8.x. This issue affects some unknown processing of the file /usr/bin/glnassys of the component NAS Command Service. The manipulation results in os command injection. The attack may be launched…
When was CVE-2026-19983 disclosed?
CVE-2026-19983 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-19983 actively exploited?
CVE-2026-19983 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 30.7% of all scored CVEs.
What is the CVSS score of CVE-2026-19983?
CVE-2026-19983 has a CVSS v3 base score of 8.3 (NVD).
How do I remediate CVE-2026-19983?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19983, 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

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