CVE-2026-19959

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreHIGH confidence

Score 9.9 from GitHub Security Advisory (severity: HIGH) published 2026-08-17. a secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.9Exploit: Elevated riskExposed: 0

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

A weakness has been identified in Edimax EW-7478APC 1.04. This affects the function formWanTcpipSetup of the file /goform/formWanTcpipSetup. This manipulation of the argument pppUserName causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
9.9
EG Score
9.9(high)
EG Risk
61(Track*)
EG Risk 61/100SSVC: 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
Severity99% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

August 16, 2026

Last Modified

August 20, 2026

Advisory Details (1)

Auto-updated Aug 20, 2026
No patch confirmed yet.
generic

Notion

https://lavender-bicycle-a5a.notion.site/EDIMAX-EW-7478APC-formWanTcpipSetup-34b53a41781f8047b36bd11dbcaa84dc?source=copy_link

Vendor Advisories for CVE-2026-19959(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 43× in last 7d / 43× 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.

  1. 2026-08-21 05:18 UTCGHSA enrichment
  2. 2026-08-21 01:13 UTCEG score recompute
  3. 2026-08-21 01:13 UTCGHSA enrichment
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 21:09 UTCGHSA enrichment
  6. 2026-08-20 17:04 UTCGHSA enrichment
  7. 2026-08-20 13:00 UTCGHSA enrichment
  8. 2026-08-20 11:41 UTCGHSA enrichment
  9. 2026-08-20 07:36 UTCGHSA enrichment
  10. 2026-08-20 03:32 UTCGHSA enrichment
  11. 2026-08-19 23:28 UTCGHSA enrichment
  12. 2026-08-19 19:24 UTCEG score recompute
  13. 2026-08-19 19:24 UTCGHSA enrichment
  14. 2026-08-19 17:03 UTCEPSS rescore
  15. 2026-08-19 15:20 UTCGHSA enrichment
  16. 2026-08-19 11:16 UTCGHSA enrichment
  17. 2026-08-19 07:11 UTCGHSA enrichment
  18. 2026-08-19 03:06 UTCGHSA enrichment
  19. 2026-08-18 22:59 UTCGHSA enrichment
  20. 2026-08-18 18:56 UTCEG score recompute
  21. 2026-08-18 18:56 UTCGHSA enrichment
  22. 2026-08-18 14:51 UTCEG score recompute
  23. 2026-08-18 14:51 UTCGHSA enrichment
  24. 2026-08-18 13:51 UTCEG score recompute
  25. 2026-08-18 13:51 UTCGHSA enrichment
Show 18 more
  1. 2026-08-18 13:48 UTCEPSS rescore
  2. 2026-08-18 13:45 UTCMITRE cvelistV5CVSS v4 → 9.4
  3. 2026-08-18 12:24 UTCGHSA enrichment
  4. 2026-08-18 08:14 UTCGHSA enrichment
  5. 2026-08-18 04:01 UTCGHSA enrichment
  6. 2026-08-17 23:56 UTCGHSA enrichment
  7. 2026-08-17 19:51 UTCGHSA enrichment
  8. 2026-08-17 15:47 UTCEG score recompute
  9. 2026-08-17 15:47 UTCGHSA enrichment
  10. 2026-08-17 13:47 UTCEPSS rescore
  11. 2026-08-17 11:43 UTCGHSA enrichment
  12. 2026-08-17 07:35 UTCGHSA enrichment
  13. 2026-08-17 03:31 UTCEG score recompute
  14. 2026-08-17 03:31 UTCGHSA enrichment
  15. 2026-08-16 23:27 UTCEG score recompute
  16. 2026-08-16 23:26 UTCNVD updateCVSS v4 → 8.6
  17. 2026-08-16 22:42 UTCEG score recompute
  18. 2026-08-16 22:41 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-19959?
CVE-2026-19959 is a critical vulnerability published on August 16, 2026. A weakness has been identified in Edimax EW-7478APC 1.04. This affects the function formWanTcpipSetup of the file /goform/formWanTcpipSetup. This manipulation of the argument pppUserName causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made…
When was CVE-2026-19959 disclosed?
CVE-2026-19959 was first published in the National Vulnerability Database on August 16, 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-2026-19959 actively exploited?
CVE-2026-19959 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 61.1% of all scored CVEs.
What is the CVSS score of CVE-2026-19959?
CVE-2026-19959 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-19959?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19959, 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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