CVE-2026-12187

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-15. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 8.8Exploit: NoneExposed: 0

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

A security vulnerability has been detected in GL.iNet GL-MT3000 up to 4.4.5. Affected by this vulnerability is an unknown functionality of the file /usr/bin/one_click_upgrade of the component Online Firmware Upgrade Handler. Such manipulation leads to command injection. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 4.7 addresses this issue. Upgrading the affected component is advised. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

CVSS v3
8.8
EG Score
8.8(high)
EPSS
77.7%
KEV
Not listed

Published

June 14, 2026

Last Modified

June 15, 2026

Advisory Details (1)

Auto-updated Jun 15, 2026
No patch confirmed yet.
generic

iot_vul/GL-iNet/MT3000/4.4.5/upgrade_online_url at main · StrTzz123/iot_vul · GitHub

https://github.com/StrTzz123/iot_vul/tree/main/GL-iNet/MT3000/4.4.5/upgrade_online_url

Vendor Advisories for CVE-2026-12187(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 32× in last 7d / 112× 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 112 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-12187?
CVE-2026-12187 is a high vulnerability published on June 14, 2026. A security vulnerability has been detected in GL.iNet GL-MT3000 up to 4.4.5. Affected by this vulnerability is an unknown functionality of the file /usr/bin/oneclickupgrade of the component Online Firmware Upgrade Handler. Such manipulation leads to command injection. The attack can be launched…
When was CVE-2026-12187 disclosed?
CVE-2026-12187 was first published in the National Vulnerability Database on June 14, 2026, with the most recent update on June 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12187 actively exploited?
CVE-2026-12187 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 77.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12187?
CVE-2026-12187 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-12187?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12187, 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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