CVE-2024-39963 is an authenticated remote command execution (RCE) vulnerability identified in AX3000 Dual-Band Gigabit Wi-Fi 6 Routers, specifically the AX9 and AX12 models running firmware version V22.03.01.46. The vulnerability resides in the macFilterType parameter processed by the /goform/setMacFilterCfg endpoint. An attacker with authenticated access and low privileges can exploit this flaw by injecting malicious commands through the macFilterType parameter, which is insufficiently sanitized, leading to command execution on the device. This vulnerability is classified under CWE-77 (Improper Neutralization of Special Elements used in a Command), indicating command injection. The CVSS 3.1 base score is 8.0, reflecting high severity due to the attack vector being adjacent network (AV:A), low attack complexity (AC:L), requiring privileges (PR:L), no user interaction (UI:N), unchanged scope (S:U), and high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). Although no public exploits have been reported, the vulnerability’s characteristics make it a critical concern for network security, as successful exploitation could allow attackers to take full control of the router, manipulate network traffic, intercept sensitive data, or disrupt network services. The lack of available patches at the time of disclosure increases the urgency for organizations to implement interim mitigations.

The impact of CVE-2024-39963 is significant for organizations relying on the affected AX3000 Wi-Fi 6 routers. Exploitation can lead to full compromise of the router, enabling attackers to execute arbitrary commands remotely. This can result in unauthorized access to network traffic, interception or modification of sensitive data, disruption of network availability, and potential pivoting to internal networks for further attacks. The confidentiality, integrity, and availability of organizational networks are all at risk. Given the widespread use of Wi-Fi 6 routers in enterprise, SMB, and home environments, the vulnerability could affect a broad range of sectors including government, healthcare, finance, and critical infrastructure. The requirement for authentication limits exploitation to insiders or attackers who have obtained credentials, but the low complexity and lack of user interaction needed make it feasible for attackers to leverage stolen or default credentials. The absence of known exploits currently reduces immediate risk but does not eliminate the threat, especially as attackers often develop exploits rapidly after disclosure.

1. Immediately restrict administrative access to the affected routers by limiting management interfaces to trusted IP addresses and using VPNs for remote access. 2. Enforce strong, unique passwords and disable default credentials to reduce the risk of unauthorized authentication. 3. Monitor router logs and network traffic for unusual activity indicative of exploitation attempts, such as unexpected command executions or configuration changes. 4. Disable or restrict the use of the macFilterType configuration feature if possible until patches are available. 5. Apply vendor-provided firmware updates as soon as they are released to remediate the vulnerability. 6. Segment networks to isolate critical systems from potentially compromised routers. 7. Conduct regular security assessments and penetration tests focusing on router configurations and access controls. 8. Educate network administrators about the vulnerability and the importance of securing router management interfaces. 9. Implement multi-factor authentication (MFA) for router access if supported to add an additional layer of security. 10. Maintain an incident response plan to quickly address any signs of compromise related to this vulnerability.