CVE-2026-86510 D-Link DIR-822A L2TP Control Message tunnel_set_params out-of-bounds write
Remote attackers can trigger an out-of-bounds write in the L2TP parser of D-Link DIR-822A routers, potentially leading to code execution or service disruption.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86510?
CVE-2026-86510 is a critical memory corruption vulnerability in D-Link DIR-822A, published on 8 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Which versions are affected by CVE-2026-86510?
How do I fix CVE-2026-86510?
No fix has been published for CVE-2026-86510 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-86510 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-86510 exists.
Sources
Also known as GHSA-435m-cghg-23gf.