CVE-2025-3328 in AC1206
Summary
by MITRE • 04/07/2025
A vulnerability was found in Tenda AC1206 15.03.06.23. It has been classified as critical. Affected is the function form_fast_setting_wifi_set of the file /goform/fast_setting_wifi_set. The manipulation of the argument ssid/timeZone leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. Other parameters might be affected as well.
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Analysis
by VulDB Data Team • 04/07/2025
The vulnerability identified as CVE-2025-3328 represents a critical buffer overflow flaw in the Tenda AC1206 router firmware version 15.03.06.23. This issue resides within the form_fast_setting_wifi_set function located in the /goform/fast_setting_wifi_set file, which serves as a web interface endpoint for configuring wireless network settings. The vulnerability manifests when processing the ssid and timeZone parameters, where improper input validation allows attackers to exceed allocated buffer boundaries and potentially execute arbitrary code on the affected device.
The technical nature of this flaw aligns with CWE-121, which describes buffer overflow conditions where insufficient bounds checking permits memory corruption. The vulnerability operates through a remote attack vector, meaning an unauthenticated attacker can exploit the issue from outside the network without requiring physical access or prior authentication. The disclosed exploit demonstrates that attackers can manipulate the ssid and timeZone parameters to trigger the buffer overflow, potentially leading to complete device compromise and unauthorized network access. This remote exploitability significantly amplifies the threat surface and makes the vulnerability particularly dangerous for widespread deployment.
The operational impact of CVE-2025-3328 extends beyond simple device compromise, as it enables attackers to gain persistent access to network infrastructure. Once exploited, the vulnerability can provide attackers with complete control over the router's configuration, allowing them to modify wireless settings, redirect traffic, or establish backdoor access points. The attack surface is further expanded by the fact that other parameters within the same function may also be susceptible to similar manipulation, creating additional attack vectors. Network administrators face significant risk as compromised routers can serve as launching points for lateral movement within corporate networks or as entry points for broader cyber attacks, aligning with tactics described in the MITRE ATT&CK framework under initial access and persistence categories.
Mitigation strategies for this vulnerability must prioritize immediate firmware updates from Tenda, as the manufacturer likely has patches available to address the buffer overflow conditions. Network segmentation and firewall rules should be implemented to limit access to router management interfaces, while monitoring systems should be deployed to detect anomalous traffic patterns indicative of exploitation attempts. Regular vulnerability assessments and network scanning should be conducted to identify potentially affected devices, and the principle of least privilege should be applied to restrict access to administrative functions. Organizations should also consider implementing intrusion detection systems that can identify exploitation attempts targeting the specific vulnerable endpoint and ensure that all network devices are regularly updated to prevent similar vulnerabilities from being exploited in the future.