CVE-2026-18588

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-03. 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 a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

A vulnerability has been found in Wavlink WL-NU516U1 708c073-mt7628. This affects the function fgets of the file nas.cgi. The manipulation of the argument CONTENT_LENGTH leads to stack-based buffer overflow. Remote exploitation of the attack is possible. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

August 3, 2026

Last Modified

August 12, 2026

References (7)

Vendor Advisories for CVE-2026-18588(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 52× in last 7d / 139× 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 139 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-18588?
CVE-2026-18588 is a critical vulnerability published on August 3, 2026. A vulnerability has been found in Wavlink WL-NU516U1 708c073-mt7628. This affects the function fgets of the file nas.cgi. The manipulation of the argument CONTENT_LENGTH leads to stack-based buffer overflow. Remote exploitation of the attack is possible. You should upgrade the affected component.…
When was CVE-2026-18588 disclosed?
CVE-2026-18588 was first published in the National Vulnerability Database 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-2026-18588 actively exploited?
CVE-2026-18588 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 53.5% of all scored CVEs.
What is the CVSS score of CVE-2026-18588?
CVE-2026-18588 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-18588?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18588, 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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