CVE-2023-46558 in X2000R Gh
Summary
by MITRE • 10/25/2023
TOTOLINK X2000R Gh v1.0.0-B20230221.0948.web was discovered to contain a stack overflow via the function formMapDelDevice.
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Analysis
by VulDB Data Team • 02/17/2026
The vulnerability identified as CVE-2023-46558 affects the TOTOLINK X2000R Gh router firmware version 1.0.0-B20230221.0948 and represents a critical stack overflow condition within the formMapDelDevice function. This type of vulnerability falls under the common weakness enumeration CWE-121 which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations on the program stack. The affected device operates as a network router and gateway, making it a prime target for network-based attacks that could potentially compromise the entire network infrastructure.
The technical flaw manifests when the router processes specific input data through the formMapDelDevice function, which appears to handle device mapping deletion operations within the router's web administration interface. Attackers can exploit this vulnerability by crafting malicious input parameters that exceed the allocated stack buffer size, causing a stack overflow condition that may result in arbitrary code execution or system crash. The vulnerability is particularly concerning because it likely occurs within the router's web server component that handles HTTP requests from remote clients, meaning the attack vector can be executed from outside the local network without requiring physical access or authentication.
From an operational impact perspective, successful exploitation of this vulnerability could enable attackers to gain unauthorized access to the router's administrative interface, potentially allowing them to modify network configurations, install malicious software, or establish persistent backdoors within the network. The attack surface is significant as routers serve as central network points and often have elevated privileges, making this vulnerability particularly dangerous for both home and enterprise networks. The stack overflow could also lead to denial of service conditions, rendering the router inaccessible to legitimate users and potentially disrupting network connectivity for all connected devices.
Mitigation strategies should include immediate firmware updates from TOTOLINK to address the specific stack overflow vulnerability, as well as network segmentation and access control measures to limit the potential impact of exploitation. Network administrators should implement monitoring solutions to detect unusual traffic patterns that might indicate exploitation attempts, particularly focusing on HTTP requests that contain malformed parameters targeting the affected web interface functions. The vulnerability aligns with ATT&CK technique T1210 which describes exploitation of remote services, and organizations should consider implementing network intrusion detection systems to identify and block malicious payloads targeting known router vulnerabilities. Additionally, disabling unnecessary remote administration features and implementing strong authentication mechanisms can reduce the attack surface while the firmware update is being deployed.