CVE-2026-12935 Unauthenticated Remote Code Execution in TP-Link TL-WR940N RTSP Conntrack Feature
An unauthenticated attacker can trigger a stack-based buffer overflow in the RTSP conntrack module, leading to remote code execution or denial of service on the router.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-12935?
CVE-2026-12935 is a high-severity memory corruption vulnerability in TP-Link Systems Inc. TL-WR940N v6, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The TL-WR940N v6 router contains a vulnerability in its RTSP connection tracking module that can lead to a stack-based buffer overflow. The issue occurs when a LAN client initiates a connection to a malicious RTSP server controlled by an attacker. A specially crafted RTSP message may trigger improper memory handling within the kernel module
Successful exploitation of this vulnerability may result in a denial-of-service (DoS) condition or allow remote code execution (RCE), potentially leading to full compromise of the device. This vulnerability can be exploited by an unauthenticated attacker under the device's default configuration.
Weakness: CWE-121
Which versions are affected by CVE-2026-12935?
How do I fix CVE-2026-12935?
No fix has been published for CVE-2026-12935 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-2026-12935 being exploited?
There is no known exploitation of CVE-2026-12935 in the wild and no public exploit code.
Sources
Also known as GHSA-4j6v-4j5m-vgpq.