External risk intelligence

Tenda N300 Router Password Policy Bypass Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.1)

CVE-2024-25343

This vulnerability affects a SOHO router's management interface. These devices are commonly deployed at the network edge, and their administration portals are frequently exposed to the local network or, in many common configurations, directly reachable via the internet for remote management purposes.

Tenda N300 Firmware

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This vulnerability affects Tenda N300 routers, allowing unauthorized users to bypass security settings and create weak passwords. This could expose the network to unauthorized access and compromise sensitive information. The main concern is confirming relevance and exposure within our environment.

Weak password creation bypasses security.
Affects network edge devices, potential access point.
Confirm if Tenda N300 routers are in use.

Attack Path

How an attacker could exploit the issue

An attacker can exploit this vulnerability by accessing the router's administration interface without authentication. This allows them to bypass the intended security policy, potentially leading to the creation of weak passwords and unauthorized access to the device.

No authentication required.
Bypasses password policy.
Weakens router security.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow unauthorized users to bypass security policies on Tenda N300 F3 routers, potentially enabling the creation of weak administrator passwords. This could affect the confidentiality and integrity of the router's configuration and the network it manages.

Router configuration and network access.
Bypass security policy to set weak passwords.
Unauthorized network control and access.

Operational Fix

Recommended remediation, mitigation, and detection steps

Network and security teams are likely responsible for addressing this vulnerability, as it impacts a Tenda N300 router's security policy and password creation. The first practical step is to identify all deployed N300 devices, determine their exposure to the network or internet, and confirm which business-critical systems may be affected before planning remediation.

Identify and confirm ownership of affected devices.
Verify network exposure and critical asset impact.
Plan and coordinate remediation actions.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is the Tenda N300 F3 router?

The Tenda N300 F3 is a small office or home office (SOHO) router used to manage internet connectivity and local network traffic. It acts as a gateway for connected devices, providing a management interface that administrators use to configure security settings and access controls.

What does CVE-2024-25343 mean for router security?

This vulnerability is classified as CWE-269, which involves improper privilege management. Specifically, it allows a user to bypass the router's enforced password security policies. By overriding these requirements, an attacker or unauthorized user can set insecure, easily guessable administrative passwords, making the device much easier to compromise later.

How can an attacker trigger this vulnerability?

An attacker triggers this flaw by interacting with the router's administration interface without needing to provide legitimate authentication credentials first. It is important to note that this does not require physical access to the device; however, it cannot be triggered if the administration interface is completely disabled or unreachable from the network where the attacker is located.

Is my Tenda N300 router at risk?

According to Halo Surface Signal, this risk is relevant if your device's management portal is reachable. Because these routers are often placed at the network edge, their administration interfaces are frequently accessible from the local network. In some setups, these portals are also inadvertently exposed directly to the internet for remote management, which significantly increases the likelihood of unauthorized access.

What should I do if I use Tenda N300 devices?

Start by performing an inventory to locate all Tenda N300 routers in your environment. Once identified, verify whether their administration interfaces are reachable from your internal network or the public internet. After assessing this exposure, prioritize limiting access to the management portal and look for official firmware updates from the vendor to resolve the password policy bypass.

References

tenda.com/

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.