CVE-2026-75118 http_gdpr_decrypt Pre-Authentication Stack-Based Buffer Overflow
An adjacent unauthenticated attacker can trigger a stack-based buffer overflow in the router's web interface, potentially achieving arbitrary code execution or causing a service crash.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-75118?
CVE-2026-75118 is a high-severity memory corruption vulnerability in TP-Link Systems Inc. TL-MR100 v3.20, published on 28 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A pre-authentication stack-based buffer overflow vulnerability exists in the http_gdpr_decrypt function of TL-MR100 V3.20 due to insufficient bounds checking of encrypted requests to the /cgi/login endpoint. An adjacent unauthenticated attacker with access to the router's web management interface can trigger memory corruption and potentially achieve arbitrary code execution.
Successful exploitation can overwrite saved control-flow data on the httpd process stack prior to authentication, resulting in a service crash or potential arbitrary code execution in the context of the affected process.
Weakness: CWE-121
Which versions are affected by CVE-2026-75118?
How do I fix CVE-2026-75118?
No fix has been published for CVE-2026-75118 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-2026-75118 being exploited?
There is no known exploitation of CVE-2026-75118 in the wild and no public exploit code.
Sources
Also known as GHSA-p3fv-q9vc-j25p.