CVE-2026-18685

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-04. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3.6%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

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

A security vulnerability has been detected in GL.iNet GL-MT3000 up to 4.4.5. Impacted is the function set_upgrade of the file /cgi-bin/glc of the component modem.so. Such manipulation leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure and confirmed the existence of the vulnerability.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
75
EG Risk 75/100CISA SSVC

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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
3.6%
EPSS %ILE
89th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 3, 2026

Last Modified

August 12, 2026

Advisory Details (1)

Auto-updated Oct 1, 2026
No patch confirmed yet.
generic

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

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

Vendor Advisories for CVE-2026-18685(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 19× in last 7d / 136× 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 376 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-18685?
CVE-2026-18685 is a critical vulnerability published on August 3, 2026. A security vulnerability has been detected in GL.iNet GL-MT3000 up to 4.4.5. Impacted is the function set_upgrade of the file /cgi-bin/glc of the component modem.so. Such manipulation leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed publicly…
When was CVE-2026-18685 disclosed?
CVE-2026-18685 was first published on August 3, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18685 actively exploited?
CVE-2026-18685 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.6% probability of exploitation in the next 30 days (89th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18685?
CVE-2026-18685 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18685?
No fix for CVE-2026-18685 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-18685 are linked in the Vendor Advisories panel on this page.

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