CVE-2024-33182 is a stack-based buffer overflow vulnerability identified in the Tenda AC18 router firmware version V15.03.3.10_EN. The vulnerability arises from improper bounds checking of the deviceId parameter in the ip/goform/addWifiMacFilter endpoint, which is part of the router's web management interface. This flaw allows an attacker with network access and low privileges to send a specially crafted request that overflows the stack buffer, potentially leading to arbitrary code execution. The vulnerability does not require user interaction, increasing its risk profile. The CVSS v3.1 base score is 8.3, reflecting high impact on confidentiality and integrity, with a low impact on availability. The attack vector is network-based (AV:N), with low attack complexity (AC:L), requiring privileges (PR:L) but no user interaction (UI:N). The vulnerability scope is unchanged (S:U), meaning exploitation affects only the vulnerable component. No patches or mitigations have been officially released yet, and no exploits have been observed in the wild. The underlying weakness is classified under CWE-121, indicating a classic stack-based buffer overflow. This vulnerability could allow attackers to execute arbitrary code remotely, potentially taking full control of the device, intercepting or modifying network traffic, or disrupting network operations.

The vulnerability poses a significant risk to organizations using the Tenda AC18 router, as successful exploitation can lead to remote code execution with elevated privileges. This compromises the confidentiality and integrity of network communications and device configurations. Attackers could manipulate network traffic, create persistent backdoors, or disrupt network availability. Given the router’s role as a gateway device, compromise could extend to internal networks, affecting connected systems and data. The lack of user interaction and low attack complexity increases the likelihood of exploitation in targeted or opportunistic attacks. Although no exploits are currently known in the wild, the public disclosure and high CVSS score may prompt attackers to develop exploits rapidly. Organizations relying on this hardware for critical infrastructure or sensitive data transmission face heightened risk, especially if remote management interfaces are exposed to untrusted networks.

1. Immediately restrict access to the router’s management interface by limiting it to trusted internal networks or VPNs. 2. Disable remote management features if not strictly necessary. 3. Implement network segmentation to isolate vulnerable devices from critical assets. 4. Monitor network traffic for anomalous requests targeting the ip/goform/addWifiMacFilter endpoint, especially those containing suspicious deviceId parameters. 5. Employ intrusion detection/prevention systems (IDS/IPS) with signatures or heuristics to detect buffer overflow attempts. 6. Regularly check for firmware updates from Tenda and apply patches promptly once available. 7. Consider replacing affected devices with models from vendors with more robust security track records if patching is delayed. 8. Educate network administrators about this vulnerability and encourage proactive security hygiene around router management.