CVE-2026-100740 D-Link DIR-895L L2TP Control Channel tunnel.c tunnel_set_params out-of-bounds write
Remote attackers can trigger an out-of-bounds write in the L2TP parser of D-Link DIR-895L routers, potentially leading to arbitrary code execution.
- 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-2026-100740?
CVE-2026-100740 is a critical memory corruption vulnerability in D-Link DIR-895L, published on 27 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was detected in D-Link DIR-895L A1_102b07. Impacted is the function tunnel_set_params of the file tunnel.c of the component L2TP Control Channel Parser. Performing a manipulation results in out-of-bounds write. The attack may be initiated remotely. The exploit is now public and may be used.
Which versions are affected by CVE-2026-100740?
How do I fix CVE-2026-100740?
No fix has been published for CVE-2026-100740 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-2026-100740 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100740 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-87gr-9jjp-5f3j.