CVE-2026-86510

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreHIGH confidence

Score 9.9 from GitHub Security Advisory (severity: HIGH) published 2026-09-08. a secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 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 vulnerability has been found in D-Link DIR-822A A_101. Affected is the function tunnel_set_params of the component L2TP Control Message Parser. Such manipulation leads to out-of-bounds write. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

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

September 8, 2026

Last Modified

September 8, 2026

Advisory Details (2)

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

Smart Home, SMB and Enterprise solutions | D-Link

https://www.dlink.com/
generic

Notion

https://tzh00203.notion.site/D-Link-DIR-822A-L2TP-Host-Name-AVP-Out-of-Bounds-Write-33cb5c52018a80a7af5fdc1af3d5aa73

Vendor Advisories for CVE-2026-86510(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 55× in last 7d / 105× 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 105 total refreshes for this CVE.

  1. 2026-09-20 12:30 UTCGHSA enrichment
  2. 2026-09-20 08:07 UTCGHSA enrichment
  3. 2026-09-20 03:47 UTCGHSA enrichment
  4. 2026-09-19 23:51 UTCGHSA enrichment
  5. 2026-09-19 19:55 UTCGHSA enrichment
  6. 2026-09-19 15:59 UTCEG score recompute
  7. 2026-09-19 15:59 UTCGHSA enrichment
  8. 2026-09-19 11:58 UTCGHSA enrichment
  9. 2026-09-19 08:02 UTCGHSA enrichment
  10. 2026-09-19 04:06 UTCGHSA enrichment
  11. 2026-09-19 00:11 UTCGHSA enrichment
  12. 2026-09-18 20:15 UTCEG score recompute
  13. 2026-09-18 20:15 UTCGHSA enrichment
  14. 2026-09-18 19:28 UTCEPSS rescore
  15. 2026-09-18 16:14 UTCGHSA enrichment
  16. 2026-09-18 12:03 UTCGHSA enrichment
  17. 2026-09-18 08:07 UTCGHSA enrichment
  18. 2026-09-18 04:12 UTCGHSA enrichment
  19. 2026-09-18 00:16 UTCGHSA enrichment
  20. 2026-09-17 20:20 UTCEG score recompute
  21. 2026-09-17 20:20 UTCGHSA enrichment
  22. 2026-09-17 19:32 UTCEPSS rescore
  23. 2026-09-17 14:46 UTCGHSA enrichment
  24. 2026-09-17 10:50 UTCGHSA enrichment
  25. 2026-09-17 06:54 UTCGHSA enrichment
Show 75 more
  1. 2026-09-17 02:58 UTCGHSA enrichment
  2. 2026-09-16 22:27 UTCGHSA enrichment
  3. 2026-09-16 18:18 UTCEG score recompute
  4. 2026-09-16 18:18 UTCGHSA enrichment
  5. 2026-09-16 14:09 UTCEPSS rescore
  6. 2026-09-16 13:59 UTCGHSA enrichment
  7. 2026-09-16 10:03 UTCGHSA enrichment
  8. 2026-09-16 06:07 UTCEG score recompute
  9. 2026-09-16 06:07 UTCGHSA enrichment
  10. 2026-09-16 05:15 UTCEPSS rescore
  11. 2026-09-16 02:11 UTCGHSA enrichment
  12. 2026-09-15 22:15 UTCGHSA enrichment
  13. 2026-09-15 18:17 UTCGHSA enrichment
  14. 2026-09-15 14:04 UTCGHSA enrichment
  15. 2026-09-15 10:07 UTCGHSA enrichment
  16. 2026-09-15 06:11 UTCEG score recompute
  17. 2026-09-15 06:10 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 02:13 UTCGHSA enrichment
  21. 2026-09-14 22:17 UTCGHSA enrichment
  22. 2026-09-14 18:21 UTCGHSA enrichment
  23. 2026-09-14 14:24 UTCGHSA enrichment
  24. 2026-09-14 10:28 UTCGHSA enrichment
  25. 2026-09-14 06:32 UTCGHSA enrichment
  26. 2026-09-14 02:37 UTCGHSA enrichment
  27. 2026-09-13 22:41 UTCGHSA enrichment
  28. 2026-09-13 18:46 UTCEG score recompute
  29. 2026-09-13 18:46 UTCGHSA enrichment
  30. 2026-09-13 14:50 UTCGHSA enrichment
  31. 2026-09-13 10:46 UTCGHSA enrichment
  32. 2026-09-13 06:50 UTCGHSA enrichment
  33. 2026-09-13 02:46 UTCGHSA enrichment
  34. 2026-09-12 22:51 UTCGHSA enrichment
  35. 2026-09-12 18:55 UTCEG score recompute
  36. 2026-09-12 18:55 UTCGHSA enrichment
  37. 2026-09-12 15:00 UTCGHSA enrichment
  38. 2026-09-12 11:04 UTCGHSA enrichment
  39. 2026-09-12 07:05 UTCGHSA enrichment
  40. 2026-09-12 03:09 UTCGHSA enrichment
  41. 2026-09-11 23:13 UTCGHSA enrichment
  42. 2026-09-11 18:38 UTCEG score recompute
  43. 2026-09-11 18:38 UTCGHSA enrichment
  44. 2026-09-11 14:53 UTCEPSS rescore
  45. 2026-09-11 14:53 UTCEPSS rescore
  46. 2026-09-11 14:42 UTCGHSA enrichment
  47. 2026-09-11 10:46 UTCEG score recompute
  48. 2026-09-11 10:46 UTCGHSA enrichment
  49. 2026-09-11 06:49 UTCGHSA enrichment
  50. 2026-09-11 02:53 UTCGHSA enrichment
  51. 2026-09-10 22:57 UTCGHSA enrichment
  52. 2026-09-10 19:01 UTCGHSA enrichment
  53. 2026-09-10 15:05 UTCGHSA enrichment
  54. 2026-09-10 11:09 UTCEG score recompute
  55. 2026-09-10 11:08 UTCGHSA enrichment
  56. 2026-09-10 07:07 UTCGHSA enrichment
  57. 2026-09-10 03:11 UTCGHSA enrichment
  58. 2026-09-09 23:15 UTCGHSA enrichment
  59. 2026-09-09 18:43 UTCGHSA enrichment
  60. 2026-09-09 14:47 UTCGHSA enrichment
  61. 2026-09-09 10:51 UTCGHSA enrichment
  62. 2026-09-09 06:55 UTCGHSA enrichment
  63. 2026-09-09 02:59 UTCGHSA enrichment
  64. 2026-09-08 23:03 UTCEG score recompute
  65. 2026-09-08 23:03 UTCGHSA enrichment
  66. 2026-09-08 22:01 UTCEPSS rescore
  67. 2026-09-08 18:14 UTCEG score recompute
  68. 2026-09-08 18:14 UTCGHSA enrichment
  69. 2026-09-08 17:28 UTCNVD updateCVSS v4 → 8.6
  70. 2026-09-08 16:45 UTCEG score recompute
  71. 2026-09-08 16:45 UTCGHSA enrichment
  72. 2026-09-08 16:25 UTCMITRE cvelistV5CVSS v4 → 9.4
  73. 2026-09-08 13:43 UTCGHSA enrichment
  74. 2026-09-08 10:30 UTCGHSA enrichment
  75. 2026-09-08 06:34 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86510?
CVE-2026-86510 is a critical vulnerability published on September 8, 2026. A vulnerability has been found in D-Link DIR-822A A101. Affected is the function tunnelset_params of the component L2TP Control Message Parser. Such manipulation leads to out-of-bounds write. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
When was CVE-2026-86510 disclosed?
CVE-2026-86510 was first published in the National Vulnerability Database on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86510 actively exploited?
CVE-2026-86510 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 60.7% of all scored CVEs.
What is the CVSS score of CVE-2026-86510?
CVE-2026-86510 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-86510?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86510, 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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