TP-Link Deco M5 Password Hashing weak password hash

Summaryinfo

A vulnerability described as problematic has been identified in TP-Link Deco M5. Impacted is an unknown function of the component Password Hashing. Such manipulation leads to weak password hash. This vulnerability is traded as CVE-2026-5040. An attack has to be approached locally. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in TP-Link Deco M5 (unknown version). Affected by this issue is an unknown code block of the component Password Hashing. The manipulation with an unknown input leads to a weak password hash vulnerability. Using CWE to declare the problem leads to CWE-916. The product generates a hash for a password, but it uses a scheme that does not provide a sufficient level of computational effort that would make password cracking attacks infeasible or expensive. Impacted is confidentiality. CVE summarizes:

TP-Link Deco M5 v1 uses a weak password hashing mechanism to store user credentials. An attacker who obtains the password hash through system compromise or privileged access could perform brute-force or dictionary attacks. Successful exploitation may result in disclosure of authentication credentials, enabling unauthorized access to device management functions, depending on the privileges associated with the recovered password. The primary security impact is loss of confidentiality.

The advisory is available at tp-link.com. This vulnerability is handled as CVE-2026-5040 since 03/27/2026. The exploitation is known to be difficult. Local access is required to approach this attack. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1552 by the MITRE ATT&CK project.

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

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Productinfo

Vendor

• TP-Link

Name

• Deco M5

License

• commercial

Website

• Vendor: https://www.tp-link.com/

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