D-Link DIR-605 B1v202WWB03 L2TP Control Message Parser tunnel.c tunnel_set_params peer_hostname  off-by-one

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.4$0-$5k2.38+

Summaryinfo

A vulnerability marked as problematic has been reported in D-Link DIR-605 B1v202WWB03. Impacted is the function tunnel_set_params of the file progs.gpl/pppd.alpha/l2tp/tunnel.c of the component L2TP Control Message Parser. Performing a manipulation of the argument peer_hostname  results in off-by-one. This vulnerability is cataloged as CVE-2026-86297. It is possible to initiate the attack remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in D-Link DIR-605 B1v202WWB03. This affects the function tunnel_set_params of the file progs.gpl/pppd.alpha/l2tp/tunnel.c of the component L2TP Control Message Parser. The manipulation of the argument peer_hostname  with an unknown input leads to a off-by-one vulnerability. CWE is classifying the issue as CWE-193. A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value. This is going to have an impact on confidentiality, integrity, and availability.

It is possible to read the advisory at tzh00203.notion.site. This vulnerability is uniquely identified as CVE-2026-86297. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/06/2026).

The exploit is shared for download at tzh00203.notion.site. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 7.4

VulDB Base Score: 8.1
VulDB Temp Score: 7.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Off-by-one
CWE: CWE-193 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

09/06/2026 Advisory disclosed
09/06/2026 +0 days VulDB entry created
09/06/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: dlink.com

Advisory: tzh00203.notion.site
Status: Not defined

CVE: CVE-2026-86297 (🔒)
GCVE (CVE): GCVE-0-2026-86297
GCVE (VulDB): GCVE-100-399459
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/06/2026 18:23
Changes: 09/06/2026 18:23 (58)
Complete: 🔍
Submitter: tian
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #906299: D-Link DIR605 B1v202WWB03 B1v202WWB03 Out-of-bounds Write (by tian)

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