CVE-2026-12935
Unauthenticated Remote Code Execution in TP-Link TL-WR940N RTSP Conntrack Feature
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.
INFO
Published Date :
July 29, 2026, 7:16 p.m.
Last Modified :
Oct. 24, 2026, 1:10 p.m.
Remotely Exploit :
Yes !
Source :
f23511db-6c3e-4e32-a477-6aa17d310630
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | HIGH | f23511db-6c3e-4e32-a477-6aa17d310630 | ||||
| CVSS 4.0 | HIGH | f23511db-6c3e-4e32-a477-6aa17d310630 |
Solution
- Update the router firmware.
- Apply vendor patches when available.
- Restrict RTSP connections.
- Disable unnecessary services.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-12935.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-12935 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-12935
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-12935 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-12935 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Added Translation Title: TL-WR940N de TP-Link Systems Inc., Description: El router TL-WR940N v6 contiene una vulnerabilidad en su módulo de seguimiento de conexiones RTSP que puede conducir a un desbordamiento de búfer basado en pila. El problema ocurre cuando un cliente de LAN inicia una conexión a un servidor RTSP malicioso controlado por un atacante. Un mensaje RTSP especialmente diseñado puede desencadenar un manejo inadecuado de la memoria dentro del módulo del kernel. La explotación exitosa de esta vulnerabilidad puede resultar en una condición de denegación de servicio (DoS) o permitir la ejecución remota de código (RCE), lo que podría llevar a un compromiso total del dispositivo. Esta vulnerabilidad puede ser explotada por un atacante no autenticado bajo la configuración predeterminada del dispositivo. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 30, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-12935', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-29T18:45:40.464526Z'} {'id': 'CVE-2026-12935', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-29T00:00:00+00:00'} -
New CVE Received by f23511db-6c3e-4e32-a477-6aa17d310630
Jul. 29, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'TP-Link Systems Inc.', 'product': 'TL-WR940N v6', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '(US)_V6_260528', 'versionType': 'custom'}, {'status': 'affected', 'version': '0', 'lessThan': '(JP)_V6_260527', 'versionType': 'custom'}, {'status': 'affected', 'version': '0', 'lessThan': '(EU)_V6_260528', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-121 Added Reference https://www.tp-link.com/en/support/download/tl-wr940n/v6/#Firmware Added Reference https://www.tp-link.com/jp/support/download/tl-wr940n/v6/#Firmware Added Reference https://www.tp-link.com/us/support/download/tl-wr940n/v6/#Firmware Added Reference https://www.tp-link.com/us/support/faq/5213/ -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 29, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-12935', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-29T18:45:40.464526Z'}