CVE-2025-9938 D-Link DI-8400 yyxz.asp yyxz_dlink_asp stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the D-Link DI-8400 router via the yyxz.asp endpoint, 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-2025-9938?
CVE-2025-9938 is a high-severity memory corruption vulnerability in D-Link DI-8400, published on 3 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A weakness has been identified in D-Link DI-8400 16.07.26A1. The affected element is the function yyxz_dlink_asp of the file /yyxz.asp. This manipulation of the argument ID causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be exploited.
Which versions are affected by CVE-2025-9938?
It affects 1 product.
Products include Dlink Di-8400 Firmware.
How do I fix CVE-2025-9938?
No fix has been published for CVE-2025-9938 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-2025-9938 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9938 exists.
Other vulnerabilities in D-Link DI-8400
Sources
Also known as GHSA-pmpm-w6cf-w2p8.