CVE-2021-40521

Vulnerability

Airangel HSMX Gateway devices running ElevenOS through version 5.2.04 are affected by a remote code execution (RCE) vulnerability. The exact nature of the vulnerability is not publicly detailed in the provided references, but the official CVE description confirms the issue exists in these devices. The affected version range includes all firmware versions up to and including 5.2.04 [1].

Exploitation

No exploit details are provided in the available references. However, based on the CVE description, the vulnerability is remotely exploitable, likely without authentication, as no privileges or user interaction are mentioned. The attacker would need network access to the affected HSMX Gateway device to trigger the code execution.

Impact

Successful exploitation allows an attacker to achieve remote code execution on the device, gaining full control over the gateway. This could lead to complete compromise of the device, including the ability to modify configurations, intercept traffic, or pivot to other network resources. The impact is high due to the critical role of the gateway in network security and management.

Mitigation

As of the publication date (2021-11-10), no fixed version or vendor advisory is mentioned in the provided references. Users are advised to check the vendor's website for updates [1] and apply any available patches promptly. If no patch is yet available, consider network-level mitigations such as restricting access to the device from untrusted networks until a fix is released.