Check Point Advisories

Tenda AC21 Stack Overflow (CVE-2025-13445)

Vulnerability
Protection

Check Point Reference:	CPAI-2025-9659
Date Published:	5 Jan 2026
Severity:	Critical
Last Updated:	Monday 05 January, 2026
Source:
Industry Reference:	CVE-2025-13445
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Tenda AC21 16.03.08.16
Vulnerability Description	A stack overflow vulnerability in Tenda AC21 allows remote attackers to execute arbitrary code by manipulating the argument list in the /goform/SetIpMacBind file.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Tenda AC21 Stack Overflow (CVE-2025-13445) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Application Servers Protection Violation.
Attack Information: Tenda AC21 Stack Overflow (CVE-2025-13445)