CVE-2026-77148

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

Score 9.9 from GitHub Security Advisory (severity: HIGH) published 2026-08-20. A secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
9.9EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 9.9Exploit: 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 vulnerability was found in Comfast CF-N1-S 2.6.0.1. This impacts the function sub_44B50C of the file /cgi-bin/mbox-config?method=SET§ion=ptest_channel of the component Web Management. The manipulation results in stack-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used.

CVSS v3
9.9
EG Score
9.9CRITICALmedium confidence
EG Risk
61
EG Risk 61/100CISA 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
Severity99% × 45%
Exploitation40% × 40%
Automatability0% × 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
0.8%
EPSS %ILE
54th
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 no (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 20, 2026

Last Modified

August 24, 2026

Advisory Details (1)

Auto-updated Sep 28, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Comfast CF-N1-S Router V2.6.0.1 Contains a Stack Overflow Vulnerability · Issue #7 · AdminSafe/CVE · GitHub

https://github.com/AdminSafe/CVE/issues/7

Vendor Advisories for CVE-2026-77148(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 40× in last 7d / 198× 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 325 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-77148?
CVE-2026-77148 is a critical vulnerability published on August 20, 2026. A vulnerability was found in Comfast CF-N1-S 2.6.0.1. This impacts the function sub44B50C of the file /cgi-bin/mbox-config?method=SET&section=ptestchannel of the component Web Management. The manipulation results in stack-based buffer overflow. The attack can be launched remotely. The exploit has…
When was CVE-2026-77148 disclosed?
CVE-2026-77148 was first published on August 20, 2026, with the most recent update on August 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77148 actively exploited?
CVE-2026-77148 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77148?
CVE-2026-77148 has a CVSS base score of 9.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77148?
No fix for CVE-2026-77148 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-2026-77148 are linked in the Vendor Advisories panel on this page.

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