CVE-2025-13189 D-Link DIR-816L gena.cgi genacgi_main stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the D-Link DIR-816L router's gena.cgi script to execute arbitrary code.
- 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-2025-13189?
CVE-2025-13189 is a high-severity memory corruption vulnerability in D-Link DIR-816L, published on 15 Nov 2025. 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-816L 2_06_b09_beta. This affects the function genacgi_main of the file gena.cgi. The manipulation of the argument SERVER_ID/HTTP_SID leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.
Which versions are affected by CVE-2025-13189?
It affects 1 product.
Products include Dlink Dir-816l Firmware.
How do I fix CVE-2025-13189?
No fix has been published for CVE-2025-13189 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-2025-13189 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-13189 exists.
Other vulnerabilities in D-Link DIR-816L
- CVE-2022-28956 Auth bypass in n/a
- CVE-2020-15893 Command injection in n/a
- CVE-2025-13188 D-Link DIR-816L authentication.cgi authenticationcgi_main stack-based overflow
- CVE-2025-13190 D-Link DIR-816L __ajax_exporer.sgi scandir_main stack-based overflow
- CVE-2025-13191 D-Link DIR-816L soap.cgi soapcgi_main stack-based overflow
Sources
Also known as GHSA-27q7-wp8x-jjqq.