CVE-2026-91001

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreHIGH confidence

Score 9.9 from GitHub Security Advisory (severity: HIGH) published 2026-09-15. 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 security flaw has been discovered in D-Link DI-8400 16.07. This affects the function ddns_asp of the file /ddns.asp of the component DDNS Configuration. Performing a manipulation of the argument serv/user/host/wild/mx/bmx/cust/ip results in stack-based buffer overflow. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks.

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
41%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 15, 2026

Advisory Details (3)

Auto-updated Sep 15, 2026
No patch confirmed yet.
generic

Smart Home, SMB and Enterprise solutions | D-Link

https://www.dlink.com/
generic

Xray-s-cve-/ddns_asp at main · Vivi-Xray/Xray-s-cve- · GitHub

https://github.com/Vivi-Xray/Xray-s-cve-/tree/main/ddns_asp
generic

Xray-s-cve-/ddns_asp/ddns_asp.py at main · Vivi-Xray/Xray-s-cve- · GitHub

https://github.com/Vivi-Xray/Xray-s-cve-/blob/main/ddns_asp/ddns_asp.py

Vendor Advisories for CVE-2026-91001(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 47× in last 7d / 47× 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. 2026-09-20 02:59 UTCGHSA enrichment
  2. 2026-09-19 22:44 UTCGHSA enrichment
  3. 2026-09-19 18:29 UTCEG score recompute
  4. 2026-09-19 18:29 UTCGHSA enrichment
  5. 2026-09-19 14:14 UTCGHSA enrichment
  6. 2026-09-19 09:59 UTCGHSA enrichment
  7. 2026-09-19 05:45 UTCGHSA enrichment
  8. 2026-09-19 01:30 UTCGHSA enrichment
  9. 2026-09-18 21:15 UTCEG score recompute
  10. 2026-09-18 21:15 UTCGHSA enrichment
  11. 2026-09-18 19:28 UTCEPSS rescore
  12. 2026-09-18 16:59 UTCGHSA enrichment
  13. 2026-09-18 12:44 UTCGHSA enrichment
  14. 2026-09-18 08:29 UTCGHSA enrichment
  15. 2026-09-18 04:15 UTCGHSA enrichment
  16. 2026-09-18 00:00 UTCGHSA enrichment
  17. 2026-09-17 19:45 UTCEG score recompute
  18. 2026-09-17 19:45 UTCGHSA enrichment
  19. 2026-09-17 19:32 UTCEPSS rescore
  20. 2026-09-17 15:30 UTCGHSA enrichment
  21. 2026-09-17 11:09 UTCGHSA enrichment
  22. 2026-09-17 06:54 UTCGHSA enrichment
  23. 2026-09-17 02:39 UTCGHSA enrichment
  24. 2026-09-16 22:20 UTCGHSA enrichment
  25. 2026-09-16 17:55 UTCEG score recompute
Show 22 more
  1. 2026-09-16 17:55 UTCGHSA enrichment
  2. 2026-09-16 14:09 UTCEPSS rescore
  3. 2026-09-16 13:03 UTCGHSA enrichment
  4. 2026-09-16 08:48 UTCEG score recompute
  5. 2026-09-16 08:48 UTCGHSA enrichment
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-16 04:23 UTCGHSA enrichment
  8. 2026-09-16 00:01 UTCGHSA enrichment
  9. 2026-09-15 19:46 UTCGHSA enrichment
  10. 2026-09-15 15:31 UTCGHSA enrichment
  11. 2026-09-15 14:52 UTCEG score recompute
  12. 2026-09-15 14:52 UTCGHSA enrichment
  13. 2026-09-15 14:51 UTCNVD updateCVSS v4 → 8.6
  14. 2026-09-15 14:18 UTCEG score recompute
  15. 2026-09-15 14:18 UTCGHSA enrichment
  16. 2026-09-15 14:18 UTCMITRE cvelistV5CVSS v4 → 9.4
  17. 2026-09-15 10:44 UTCEG score recompute
  18. 2026-09-15 10:44 UTCGHSA enrichment
  19. 2026-09-15 06:28 UTCEG score recompute
  20. 2026-09-15 06:28 UTCNVD updateCVSS v4 → 8.6
  21. 2026-09-15 05:27 UTCEG score recompute
  22. 2026-09-15 05:23 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91001?
CVE-2026-91001 is a critical vulnerability published on September 15, 2026. A security flaw has been discovered in D-Link DI-8400 16.07. This affects the function ddns_asp of the file /ddns.asp of the component DDNS Configuration. Performing a manipulation of the argument serv/user/host/wild/mx/bmx/cust/ip results in stack-based buffer overflow. The attack can be initiated…
When was CVE-2026-91001 disclosed?
CVE-2026-91001 was first published in the National Vulnerability Database on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91001 actively exploited?
CVE-2026-91001 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 59.2% of all scored CVEs.
What is the CVSS score of CVE-2026-91001?
CVE-2026-91001 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-91001?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91001, 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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