CVE-2025-6751 Linksys E8450 HTTP POST Request portal.cgi set_device_language buffer overflow
Remote attackers can trigger a buffer overflow in the Linksys E8450 router via a crafted HTTP POST request, potentially leading to 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-2025-6751?
CVE-2025-6751 is a high-severity memory corruption vulnerability in Linksys E8450, published on 27 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability, which was classified as critical, was found in Linksys E8450 up to 1.2.00.360516. This affects the function set_device_language of the file portal.cgi of the component HTTP POST Request Handler. The manipulation of the argument dut_language leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2025-6751?
How do I fix CVE-2025-6751?
No fix has been published for CVE-2025-6751 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-2025-6751 being exploited?
There is no known exploitation of CVE-2025-6751 in the wild and no public exploit code.
Sources
Also known as GHSA-6p5h-8mpm-mwqp.