CVE-2026-12935 Details
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.
A stack-based buffer overflow vulnerability has been identified in the TP-Link TL-WR940N V6 router, specifically within the RTSP connection tracking module. This vulnerability arises when a LAN client connects to a malicious RTSP server. A specially crafted RTSP message can exploit improper memory handling in the kernel module. Successful exploitation may lead to a denial-of-service condition or allow remote code execution, potentially compromising the device entirely. This issue can be exploited by an unauthenticated attacker under the default configuration.
Users are advised to update their devices to the latest firmware version that addresses this vulnerability. The fixed firmware version is TL-WR940N V6_260528 for English and US versions, and TL-WR940N V6_260527 for the Japanese version.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 29, 2026CISA-ADP
Assessed Jul 29, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.tp-link.com/en/support/download/tl-wr940n/v6/#Firmware | TPLink | ProductVendor |
| https://www.tp-link.com/jp/support/download/tl-wr940n/v6/#Firmware | TPLink | ProductVendor |
| https://www.tp-link.com/us/support/download/tl-wr940n/v6/#Firmware | TPLink | ProductVendor |
| https://www.tp-link.com/us/support/faq/5213/ | TPLink | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-121 | Stack-based Buffer Overflow | TPLink |
Affected Products
| Product | Versions |
|---|---|
| TP-Link TL-WR940N | < V6_260528 < V6_260527 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 30, 2026 | CVE Modified | CISA-ADP |
| Jul 29, 2026 | New CVE Received | TPLink |
| Jul 29, 2026 | CVE Modified | CISA-ADP |