CVE-2025-6121 D-Link DIR-632 HTTP POST Request get_pure_content stack-based overflow
Remote attackers can execute arbitrary code via a stack-based buffer overflow in the HTTP POST handler of unsupported D-Link DIR-632 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-2025-6121?
CVE-2025-6121 is a critical memory corruption vulnerability in D-Link DIR-632, published on 16 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability, which was classified as critical, has been found in D-Link DIR-632 FW103B08. Affected by this issue is the function get_pure_content of the component HTTP POST Request Handler. The manipulation of the argument Content-Length leads to stack-based buffer overflow. The attack may be launched 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-2025-6121?
It affects 1 product.
Products include Dlink Dir-632 Firmware.
How do I fix CVE-2025-6121?
No fix has been published for CVE-2025-6121 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-2025-6121 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-6121 exists.
Other vulnerabilities in D-Link DIR-632
Sources
Also known as GHSA-3gvh-jvc6-266h.