CVE-2026-86297
D-Link DIR-605 L2TP Control Message tunnel.c tunnel_set_params off-by-one
- State
- Published
- Severity
- 9.2 Critical
- Published
- Sep 7, 2026
- Updated
- Sep 9, 2026
- Reserved
- Sep 6, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 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 | VulDB |
| 3.1 | 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 | VulDB |
| 3.0 | 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 | VulDB |
| 2.0 | 7.6 High | AV:N/AC:H/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
DIR-605D-Link |
|
References
- VDB-399459 | D-Link DIR-605 L2TP Control Message tunnel.c tunnel_set_params off-by-onevdb-entrytechnical-description
- VDB-399459 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-86297 | CVE Analysis and Reportthird-party-advisory
- Submit #906299 | D-Link DIR605 B1v202WWB03 B1v202WWB03 Out-of-bounds Writethird-party-advisory
- https://tzh00203.notion.site/D-Link-DIR-605-L2TP-Host-Name-AVP-Out-of-Bounds-Write-33cb5c52018a809ba163f988c15fc1b7exploit
- https://www.dlink.com/broken-linkproduct
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