CVE-2026-90689

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-14. 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 week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

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

A security flaw has been discovered in Tenda W20E 15.11.0.61068_1546_841_CN_TDC. Impacted is the function formDelWebAuthWhiteUser. Performing a manipulation of the argument webAuthWhiteUserIndex results in stack-based buffer overflow. The attack can be initiated remotely.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
56%
KEV
Not listed

Published

September 14, 2026

Last Modified

September 14, 2026

Advisory Details (2)

Auto-updated Sep 14, 2026
No patch confirmed yet.
generic

腾达(Tenda) 官方网站 - 致力于建设值得信赖的好网络

https://www.tenda.com.cn/
generic

router-vulnerability-research/advisories/Tenda/W20E/formDelWebAuthWhiteUser/README.md at main · Amalll-Sec/router-vulnerability-research · GitHub

https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/Tenda/W20E/formDelWebAuthWhiteUser/README.md

Vendor Advisories for CVE-2026-90689(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 24× in last 7d / 46× 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. 2026-09-25 01:12 UTCEG score recompute
  2. 2026-09-25 01:12 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 12:23 UTCGHSA enrichment
  5. 2026-09-23 23:34 UTCEG score recompute
  6. 2026-09-23 23:34 UTCGHSA enrichment
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-23 10:45 UTCGHSA enrichment
  9. 2026-09-22 21:55 UTCEG score recompute
  10. 2026-09-22 21:55 UTCGHSA enrichment
  11. 2026-09-22 16:01 UTCEPSS rescore
  12. 2026-09-22 09:07 UTCEG score recompute
  13. 2026-09-22 09:06 UTCGHSA enrichment
  14. 2026-09-21 21:09 UTCEPSS rescore
  15. 2026-09-21 20:11 UTCGHSA enrichment
  16. 2026-09-21 07:22 UTCGHSA enrichment
  17. 2026-09-20 18:09 UTCGHSA enrichment
  18. 2026-09-20 05:20 UTCGHSA enrichment
  19. 2026-09-19 16:31 UTCEG score recompute
  20. 2026-09-19 16:31 UTCGHSA enrichment
  21. 2026-09-19 03:42 UTCEG score recompute
  22. 2026-09-19 03:42 UTCGHSA enrichment
  23. 2026-09-18 19:28 UTCEPSS rescore
  24. 2026-09-18 14:53 UTCGHSA enrichment
  25. 2026-09-18 02:04 UTCEG score recompute
Show 21 more
  1. 2026-09-18 02:04 UTCGHSA enrichment
  2. 2026-09-17 19:32 UTCEPSS rescore
  3. 2026-09-17 13:15 UTCGHSA enrichment
  4. 2026-09-17 00:26 UTCEG score recompute
  5. 2026-09-17 00:26 UTCGHSA enrichment
  6. 2026-09-16 14:09 UTCEPSS rescore
  7. 2026-09-16 11:36 UTCEG score recompute
  8. 2026-09-16 11:36 UTCGHSA enrichment
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-15 22:44 UTCGHSA enrichment
  11. 2026-09-15 09:54 UTCEG score recompute
  12. 2026-09-15 09:54 UTCGHSA enrichment
  13. 2026-09-15 03:12 UTCEPSS rescore
  14. 2026-09-14 21:05 UTCGHSA enrichment
  15. 2026-09-14 11:21 UTCEG score recompute
  16. 2026-09-14 11:21 UTCGHSA enrichment
  17. 2026-09-14 11:00 UTCEG score recompute
  18. 2026-09-14 11:00 UTCGHSA enrichment
  19. 2026-09-14 07:21 UTCEG score recompute
  20. 2026-09-14 06:55 UTCEG score recompute
  21. 2026-09-14 06:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-90689?
CVE-2026-90689 is a high vulnerability published on September 14, 2026. A security flaw has been discovered in Tenda W20E 15.11.0.610681546841CNTDC. Impacted is the function formDelWebAuthWhiteUser. Performing a manipulation of the argument webAuthWhiteUserIndex results in stack-based buffer overflow. The attack can be initiated remotely.
When was CVE-2026-90689 disclosed?
CVE-2026-90689 was first published in the National Vulnerability Database on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90689 actively exploited?
CVE-2026-90689 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 43.5% of all scored CVEs.
What is the CVSS score of CVE-2026-90689?
CVE-2026-90689 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-90689?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-90689, 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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