CVE-2026-86297

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-07. a secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.1Exploit: Elevated riskExposed: 0

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

A vulnerability was identified in D-Link DIR-605 B1v202WWB03. This issue affects the function tunnel_set_params of the file progs.gpl/pppd.alpha/l2tp/tunnel.c of the component L2TP Control Message Parser. Such manipulation of the argument peer_hostname  leads to off-by-one. The attack may be performed from remote. Attacks of this nature are highly complex. The exploitability is assessed as difficult. The exploit is publicly available and might be used.

CVSS v3
8.1
EG Score
8.1(high)
EG Risk
52(Track*)
EG Risk 52/100SSVC: 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
Severity81% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
63%
KEV
Not listed

Published

September 7, 2026

Last Modified

September 9, 2026

Advisory Details (1)

Auto-updated Sep 7, 2026
No patch confirmed yet.
generic

Notion

https://tzh00203.notion.site/D-Link-DIR-605-L2TP-Host-Name-AVP-Out-of-Bounds-Write-33cb5c52018a809ba163f988c15fc1b7

Vendor Advisories for CVE-2026-86297(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 27× in last 7d / 55× 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. 2026-09-19 00:30 UTCEG score recompute
  2. 2026-09-19 00:30 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 12:39 UTCGHSA enrichment
  5. 2026-09-18 00:50 UTCEG score recompute
  6. 2026-09-18 00:50 UTCGHSA enrichment
  7. 2026-09-17 19:32 UTCEPSS rescore
  8. 2026-09-17 13:00 UTCGHSA enrichment
  9. 2026-09-17 00:54 UTCEG score recompute
  10. 2026-09-17 00:54 UTCGHSA enrichment
  11. 2026-09-16 14:09 UTCEPSS rescore
  12. 2026-09-16 13:04 UTCEG score recompute
  13. 2026-09-16 13:04 UTCGHSA enrichment
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-16 01:15 UTCGHSA enrichment
  16. 2026-09-15 13:26 UTCEG score recompute
  17. 2026-09-15 13:26 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 01:37 UTCGHSA enrichment
  21. 2026-09-14 13:47 UTCGHSA enrichment
  22. 2026-09-14 01:58 UTCEG score recompute
  23. 2026-09-14 01:58 UTCGHSA enrichment
  24. 2026-09-13 14:09 UTCGHSA enrichment
  25. 2026-09-13 02:20 UTCEG score recompute
Show 30 more
  1. 2026-09-13 02:20 UTCGHSA enrichment
  2. 2026-09-12 14:30 UTCGHSA enrichment
  3. 2026-09-12 02:40 UTCEG score recompute
  4. 2026-09-12 02:40 UTCGHSA enrichment
  5. 2026-09-11 14:53 UTCEPSS rescore
  6. 2026-09-11 14:53 UTCEPSS rescore
  7. 2026-09-11 14:50 UTCEG score recompute
  8. 2026-09-11 14:50 UTCGHSA enrichment
  9. 2026-09-11 02:59 UTCGHSA enrichment
  10. 2026-09-10 15:10 UTCEG score recompute
  11. 2026-09-10 15:10 UTCGHSA enrichment
  12. 2026-09-10 03:21 UTCGHSA enrichment
  13. 2026-09-09 15:31 UTCEG score recompute
  14. 2026-09-09 15:31 UTCGHSA enrichment
  15. 2026-09-09 15:26 UTCNVD updateCVSS v4 → 8.2
  16. 2026-09-09 14:38 UTCEG score recompute
  17. 2026-09-09 14:37 UTCGHSA enrichment
  18. 2026-09-09 14:34 UTCMITRE cvelistV5CVSS v4 → 9.2
  19. 2026-09-09 13:43 UTCGHSA enrichment
  20. 2026-09-09 01:46 UTCEG score recompute
  21. 2026-09-09 01:45 UTCGHSA enrichment
  22. 2026-09-08 22:01 UTCEPSS rescore
  23. 2026-09-08 13:55 UTCGHSA enrichment
  24. 2026-09-08 11:00 UTCGHSA enrichment
  25. 2026-09-07 23:10 UTCEG score recompute
  26. 2026-09-07 23:10 UTCGHSA enrichment
  27. 2026-09-07 11:20 UTCEG score recompute
  28. 2026-09-07 11:19 UTCNVD updateCVSS v4 → 8.2
  29. 2026-09-07 10:52 UTCEG score recompute
  30. 2026-09-07 10:51 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-86297?
CVE-2026-86297 is a high vulnerability published on September 7, 2026. A vulnerability was identified in D-Link DIR-605 B1v202WWB03. This issue affects the function tunnelsetparams of the file progs.gpl/pppd.alpha/l2tp/tunnel.c of the component L2TP Control Message Parser. Such manipulation of the argument peer_hostname leads to off-by-one. The attack may be performed…
When was CVE-2026-86297 disclosed?
CVE-2026-86297 was first published in the National Vulnerability Database on September 7, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86297 actively exploited?
CVE-2026-86297 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 37.3% of all scored CVEs.
What is the CVSS score of CVE-2026-86297?
CVE-2026-86297 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-86297?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86297, 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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