CVE-2025-70244 in DIR-513
Summary
by MITRE • 03/10/2026
Stack buffer overflow vulnerability in D-Link DIR-513 v1.10 via the webPage parameter to goform/formWlanSetup.
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Analysis
by VulDB Data Team • 03/16/2026
The CVE-2025-70244 vulnerability represents a critical stack buffer overflow flaw discovered in D-Link DIR-513 wireless router firmware version 1.10. This vulnerability specifically manifests within the web management interface when processing the webPage parameter through the goform/formWlanSetup endpoint. The issue stems from inadequate input validation and bounds checking mechanisms within the router's web server implementation, creating a pathway for malicious actors to exploit memory corruption vulnerabilities. The affected device operates with a standard web interface that handles various configuration parameters, making this vulnerability particularly dangerous as it can be triggered through routine administrative operations.
The technical exploitation of this buffer overflow occurs when the webPage parameter exceeds the allocated stack buffer size during processing. This condition allows attackers to overwrite adjacent memory locations, potentially leading to arbitrary code execution or system crashes. The vulnerability follows the common pattern of stack-based buffer overflows where insufficient bounds checking permits data to overflow beyond intended memory boundaries. According to CWE-121, this maps directly to stack-based buffer overflow conditions where insufficient bounds checking allows for memory corruption. The flaw exists in the firmware's handling of user-supplied input through the web interface, which lacks proper sanitization mechanisms before processing.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it creates opportunities for remote code execution and persistent system compromise. Attackers could leverage this vulnerability to gain unauthorized administrative access to the router, potentially enabling them to modify network configurations, intercept traffic, or establish persistent backdoors. The attack surface is particularly concerning given that the vulnerability is accessible through the standard web management interface, which many users access remotely. This aligns with ATT&CK technique T1071.004 for application layer protocol usage and T1059.001 for command and scripting interpreter execution, as successful exploitation could enable attackers to execute arbitrary commands on the affected device.
Mitigation strategies should prioritize immediate firmware updates from D-Link to address the identified buffer overflow vulnerability. Network administrators should implement network segmentation and access controls to limit exposure of affected devices to untrusted networks. Additional protective measures include disabling unnecessary web management interfaces, implementing strong authentication mechanisms, and monitoring network traffic for suspicious activities related to the vulnerable endpoint. The vulnerability demonstrates the importance of proper input validation and memory management practices in embedded systems, highlighting the need for comprehensive security testing of network infrastructure devices. Organizations should also consider implementing intrusion detection systems to monitor for exploitation attempts targeting known vulnerabilities in network equipment, particularly those affecting router and switch firmware implementations.