CVE-2026-86510
D-Link DIR-822A L2TP Control Message tunnel_set_params out-of-bounds write
- State
- Published
- Severity
- 9.4 Critical
- Published
- Sep 8, 2026
- Updated
- Sep 8, 2026
- Reserved
- Sep 7, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.4 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P | VulDB |
| 3.1 | 9.9 Critical | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R | VulDB |
| 3.0 | 9.9 Critical | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R | VulDB |
| 2.0 | 9.0 High | AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
DIR-822AD-Link |
|
References
- VDB-399663 | D-Link DIR-822A L2TP Control Message tunnel_set_params out-of-bounds writevdb-entrytechnical-description
- VDB-399663 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-86510 | CVE Analysis and Reportthird-party-advisory
- Submit #906300 | D-Link DIR822A_101 A_101 Out-of-bounds Writethird-party-advisory
- https://tzh00203.notion.site/D-Link-DIR-822A-L2TP-Host-Name-AVP-Out-of-Bounds-Write-33cb5c52018a80a7af5fdc1af3d5aa73exploit
- https://www.dlink.com/product
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