CVE-2025-13188 D-Link DIR-816L authentication.cgi authenticationcgi_main stack-based overflow
Remote attackers can execute arbitrary code via a stack-based buffer overflow in the authentication.cgi script of unsupported D-Link DIR-816L routers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-13188?
CVE-2025-13188 is a critical memory corruption vulnerability in D-Link DIR-816L, published on 14 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was detected in D-Link DIR-816L 2_06_b09_beta. Affected by this vulnerability is the function authenticationcgi_main of the file /authentication.cgi. Performing manipulation of the argument Password results in stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is now public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.
Which versions are affected by CVE-2025-13188?
It affects 1 product.
Products include Dlink Dir-816l Firmware.
How do I fix CVE-2025-13188?
No fix has been published for CVE-2025-13188 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-2025-13188 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-13188 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-2025-13189 D-Link DIR-816L gena.cgi genacgi_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-5788-x3vg-5gpv.