Critical severity · published Sep 8, 2026
CVE-2026-86510
D-Link DIR-822A L2TP Control Message tunnel_set_params out-of-bounds write
9.9
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DI
DIR-822A · D-Link
A_101 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86510
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-86510
tzh00203.notion.site
https://tzh00203.notion.site/D-Link-DIR-822A-L2TP-Host-Name-AVP-Out-of-Bounds-Write-33cb5c52018a80a7af5fdc1af3d5aa73
vuldb.com
https://vuldb.com/cve/CVE-2026-86510
vuldb.com
https://vuldb.com/submit/906300
vuldb.com
https://vuldb.com/vuln/399663
vuldb.com
https://vuldb.com/vuln/399663/cti
www.dlink.com
https://www.dlink.com/
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