CVE-2026-91003

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-15. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: Elevated riskExposed: 0

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

A flaw has been found in D-Link DI-8300 16.07. The affected element is the function rzgl_asp of the file /rzgl.asp of the component CGI Service. This manipulation of the argument redirct_url causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
57(Track*)
EG Risk 57/100SSVC: 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
Severity91% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
61%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 15, 2026

Advisory Details (3)

Auto-updated Sep 15, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Xray-s-cve-/rzgl/rzgl_asp.md at main · Vivi-Xray/Xray-s-cve- · GitHub

https://github.com/Vivi-Xray/Xray-s-cve-/blob/main/rzgl/rzgl_asp.md
generic

Smart Home, SMB and Enterprise solutions | D-Link

https://www.dlink.com/
generic

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

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

Vendor Advisories for CVE-2026-91003(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 58× in last 7d / 95× 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 13:11 UTCGHSA enrichment
  2. 2026-09-25 09:25 UTCGHSA enrichment
  3. 2026-09-25 05:39 UTCGHSA enrichment
  4. 2026-09-25 01:54 UTCGHSA enrichment
  5. 2026-09-24 22:08 UTCGHSA enrichment
  6. 2026-09-24 18:22 UTCGHSA enrichment
  7. 2026-09-24 14:36 UTCEG score recompute
  8. 2026-09-24 14:36 UTCGHSA enrichment
  9. 2026-09-24 14:04 UTCEPSS rescore
  10. 2026-09-24 10:50 UTCGHSA enrichment
  11. 2026-09-24 07:03 UTCGHSA enrichment
  12. 2026-09-24 03:18 UTCGHSA enrichment
  13. 2026-09-23 23:32 UTCGHSA enrichment
  14. 2026-09-23 19:46 UTCEG score recompute
  15. 2026-09-23 19:46 UTCGHSA enrichment
  16. 2026-09-23 17:54 UTCEPSS rescore
  17. 2026-09-23 16:01 UTCGHSA enrichment
  18. 2026-09-23 12:14 UTCGHSA enrichment
  19. 2026-09-23 08:28 UTCGHSA enrichment
  20. 2026-09-23 04:42 UTCGHSA enrichment
  21. 2026-09-23 00:56 UTCGHSA enrichment
  22. 2026-09-22 21:10 UTCGHSA enrichment
  23. 2026-09-22 17:24 UTCEG score recompute
  24. 2026-09-22 17:24 UTCGHSA enrichment
  25. 2026-09-22 16:01 UTCEPSS rescore
Show 70 more
  1. 2026-09-22 13:35 UTCGHSA enrichment
  2. 2026-09-22 09:50 UTCGHSA enrichment
  3. 2026-09-22 06:03 UTCGHSA enrichment
  4. 2026-09-22 02:17 UTCGHSA enrichment
  5. 2026-09-21 22:30 UTCEG score recompute
  6. 2026-09-21 22:30 UTCGHSA enrichment
  7. 2026-09-21 21:09 UTCEPSS rescore
  8. 2026-09-21 18:44 UTCGHSA enrichment
  9. 2026-09-21 14:58 UTCGHSA enrichment
  10. 2026-09-21 11:07 UTCGHSA enrichment
  11. 2026-09-21 07:22 UTCGHSA enrichment
  12. 2026-09-21 03:23 UTCGHSA enrichment
  13. 2026-09-20 23:37 UTCEG score recompute
  14. 2026-09-20 23:37 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-20 19:50 UTCGHSA enrichment
  17. 2026-09-20 16:04 UTCGHSA enrichment
  18. 2026-09-20 12:16 UTCGHSA enrichment
  19. 2026-09-20 08:29 UTCGHSA enrichment
  20. 2026-09-20 04:37 UTCGHSA enrichment
  21. 2026-09-20 00:51 UTCGHSA enrichment
  22. 2026-09-19 21:05 UTCGHSA enrichment
  23. 2026-09-19 17:19 UTCEG score recompute
  24. 2026-09-19 17:19 UTCGHSA enrichment
  25. 2026-09-19 13:33 UTCGHSA enrichment
  26. 2026-09-19 09:48 UTCGHSA enrichment
  27. 2026-09-19 06:01 UTCGHSA enrichment
  28. 2026-09-19 02:14 UTCGHSA enrichment
  29. 2026-09-18 22:25 UTCEG score recompute
  30. 2026-09-18 22:25 UTCGHSA enrichment
  31. 2026-09-18 19:28 UTCEPSS rescore
  32. 2026-09-18 18:40 UTCGHSA enrichment
  33. 2026-09-18 14:54 UTCGHSA enrichment
  34. 2026-09-18 11:08 UTCGHSA enrichment
  35. 2026-09-18 07:22 UTCGHSA enrichment
  36. 2026-09-18 03:36 UTCGHSA enrichment
  37. 2026-09-17 23:50 UTCEG score recompute
  38. 2026-09-17 23:49 UTCGHSA enrichment
  39. 2026-09-17 19:32 UTCEPSS rescore
  40. 2026-09-17 19:23 UTCGHSA enrichment
  41. 2026-09-17 12:57 UTCGHSA enrichment
  42. 2026-09-17 09:11 UTCGHSA enrichment
  43. 2026-09-17 05:25 UTCGHSA enrichment
  44. 2026-09-17 01:39 UTCGHSA enrichment
  45. 2026-09-16 21:53 UTCGHSA enrichment
  46. 2026-09-16 18:07 UTCGHSA enrichment
  47. 2026-09-16 14:21 UTCEG score recompute
  48. 2026-09-16 14:21 UTCGHSA enrichment
  49. 2026-09-16 14:09 UTCEPSS rescore
  50. 2026-09-16 10:35 UTCGHSA enrichment
  51. 2026-09-16 06:47 UTCEG score recompute
  52. 2026-09-16 06:47 UTCGHSA enrichment
  53. 2026-09-16 05:15 UTCEPSS rescore
  54. 2026-09-16 03:02 UTCGHSA enrichment
  55. 2026-09-15 23:16 UTCGHSA enrichment
  56. 2026-09-15 19:17 UTCGHSA enrichment
  57. 2026-09-15 15:31 UTCGHSA enrichment
  58. 2026-09-15 14:52 UTCEG score recompute
  59. 2026-09-15 14:52 UTCGHSA enrichment
  60. 2026-09-15 14:51 UTCNVD updateCVSS v4 → 8.5
  61. 2026-09-15 14:18 UTCEG score recompute
  62. 2026-09-15 14:18 UTCGHSA enrichment
  63. 2026-09-15 14:18 UTCMITRE cvelistV5CVSS v4 → 9.4
  64. 2026-09-15 14:01 UTCGHSA enrichment
  65. 2026-09-15 10:15 UTCEG score recompute
  66. 2026-09-15 10:15 UTCGHSA enrichment
  67. 2026-09-15 06:28 UTCEG score recompute
  68. 2026-09-15 06:28 UTCNVD updateCVSS v4 → 8.5
  69. 2026-09-15 05:54 UTCEG score recompute
  70. 2026-09-15 05:53 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-91003?
CVE-2026-91003 is a critical vulnerability published on September 15, 2026. A flaw has been found in D-Link DI-8300 16.07. The affected element is the function rzglasp of the file /rzgl.asp of the component CGI Service. This manipulation of the argument redircturl causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been…
When was CVE-2026-91003 disclosed?
CVE-2026-91003 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-2026-91003 actively exploited?
CVE-2026-91003 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 39.3% of all scored CVEs.
What is the CVSS score of CVE-2026-91003?
CVE-2026-91003 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-91003?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91003, 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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