ASUS Router 3.0.0.4.388 series missing authentication

Summaryinfo

A vulnerability has been found in ASUS Router 3.0.0.4.388 series and classified as very critical. The impacted element is an unknown function. Performing a manipulation results in missing authentication. This vulnerability is cataloged as CVE-2026-75753. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as very critical has been found in ASUS Router 3.0.0.4.388 series. This affects an unknown part. The manipulation with an unknown input leads to a missing authentication vulnerability. CWE is classifying the issue as CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Missing Authentication for a Critical Function  in certain ASUS routers allows an unauthorized nearby user to send specific commands via HTTP requests, causing the router to return device identification information and switch into a specific mode. As a result, when the router encounters abnormal conditions, it may be unable to perform self-recovery. Refer to the ' Security Update for ASUS Router Firmware' section on the ASUS Security Advisory for more information.

The advisory is shared at asus.com. This vulnerability is uniquely identified as CVE-2026-75753 since 08/18/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/20/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• ASUS

Name

• Router

Version

• 3.0.0.4.388 series

License

• commercial

Website

• Vendor: https://www.asus.com/

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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