Vulnerability · Published Sep 8, 2026 · Assigned by VulDB
CVE-2026-86510D-Link DIR-822A L2TP Control Message tunnel_set_params out-of-bounds write
Critical 9.9
In plain English
A critical-severity out-of-bounds write in DIR-822A from D-Link. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities).
Severity (CVSS 3.1)9.9Critical
Exploit odds (30 days)0.8%top 41.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-787, CWE-119 · Vector: 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
References
- VDB-399663 | D-Link DIR-822A L2TP Control Message tunnel_set_params out-of-bounds write vdb-entry, technical-description
- VDB-399663 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-86510 | CVE Analysis and Report third-party-advisory
- Submit #906300 | D-Link DIR822A_101 A_101 Out-of-bounds Write third-party-advisory
- https://tzh00203.notion.site/D-Link-DIR-822A-L2TP-Host-Name-AVP-Out-of-Bounds-Write-33cb5c52018a80a7af5fdc1af3d5aa73 exploit
- https://www.dlink.com/ product