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critical advisory

Tenda F453 Router Stack-Based Buffer Overflow Vulnerability (CVE-2026-4553)

A stack-based buffer overflow vulnerability exists in Tenda F453 version 1.0.0.3 in the fromNatlimit function of the /goform/Natlimit Parameters Handler component, triggered remotely by manipulating the 'page' argument, allowing for potential arbitrary code execution.

A stack-based buffer overflow vulnerability, tracked as CVE-2026-4553, has been identified in Tenda F453 version 1.0.0.3. The flaw resides within the fromNatlimit function of the /goform/Natlimit component’s Parameters Handler. Publicly available exploits exist, increasing the risk of exploitation. Successful exploitation could allow an attacker to execute arbitrary code on the affected device. This vulnerability poses a significant threat to users of the Tenda F453 router, potentially…

Detection coverage 2

Detect Tenda F453 Buffer Overflow Attempt

critical

Detects attempts to exploit the stack-based buffer overflow in Tenda F453 routers by monitoring requests to the /goform/Natlimit endpoint with excessively long 'page' parameters.

sigma tactics: exploitation techniques: T1213 sources: webserver, linux

Detect Tenda F453 CVE-2026-4553 Post-Exploitation Activity

high

Detects suspicious outbound network connections from Tenda F453 routers that might indicate post-exploitation activity after a buffer overflow vulnerability.

sigma tactics: command_and_control techniques: T1071.001 sources: network_connection, linux

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