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CVE-2026-86297 (GCVE-0-2026-86297)

Vulnerability from cvelistv5 – Published: 2026-09-07 10:45 – Updated: 2026-09-07 10:45
VLAI
Title
D-Link DIR-605 L2TP Control Message tunnel.c tunnel_set_params off-by-one
Summary
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.
Severity
9.2 (Critical)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
8.1 (High)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
CWE
Assigner
References
URL Tags
https://vuldb.com/vuln/399459 vdb-entrytechnical-description
https://vuldb.com/vuln/399459/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86297 third-party-advisory
https://vuldb.com/submit/906299 third-party-advisory
https://tzh00203.notion.site/D-Link-DIR-605-L2TP-… exploit
https://www.dlink.com/ broken-linkproduct
Impacted products
Vendor Product Version CPE status
D-Link DIR-605 Affected: B1v202WWB03
    cpe:2.3:h:d-link:dir-605:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
tian (VulDB User)
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:h:d-link:dir-605:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "L2TP Control Message Parser"
          ],
          "product": "DIR-605",
          "vendor": "D-Link",
          "versions": [
            {
              "status": "affected",
              "version": "B1v202WWB03"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "tian (VulDB User)"
        }
      ],
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          "value": "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\u00a0 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."
        }
      ],
      "metrics": [
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          "url": "https://vuldb.com/vuln/399459"
        },
        {
          "name": "VDB-399459 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
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            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/399459/cti"
        },
        {
          "name": "CVE-2026-86297 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-86297"
        },
        {
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          "tags": [
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          "url": "https://tzh00203.notion.site/D-Link-DIR-605-L2TP-Host-Name-AVP-Out-of-Bounds-Write-33cb5c52018a809ba163f988c15fc1b7"
        },
        {
          "tags": [
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          "url": "https://www.dlink.com/"
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          "time": "2026-09-06T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-09-06T18:23:04.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "D-Link DIR-605 L2TP Control Message tunnel.c tunnel_set_params off-by-one",
      "x_generator": [
        "VulDB PVTS v202609"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-86297",
    "datePublished": "2026-09-07T10:45:26.431Z",
    "dateReserved": "2026-09-06T16:18:00.386Z",
    "dateUpdated": "2026-09-07T10:45:26.431Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.