CVE-2026-2926 in DWR-M960
Summary
by MITRE • 02/22/2026
A flaw has been found in D-Link DWR-M960 1.01.07. This affects the function sub_4237AC of the file /boafrm/formLteSetup of the component LTE Configuration Endpoint. Executing a manipulation of the argument submit-url can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been published and may be used.
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Analysis
by VulDB Data Team • 02/23/2026
The vulnerability identified as CVE-2026-2926 represents a critical stack-based buffer overflow flaw within the D-Link DWR-M960 router firmware version 1.01.07. This issue resides in the LTE Configuration Endpoint component, specifically within the sub_4237AC function located in the /boafrm/formLteSetup file. The vulnerability stems from insufficient input validation when processing the submit-url argument, creating an exploitable condition that allows attackers to manipulate memory layout through crafted malicious inputs. The flaw's severity is amplified by its remote exploitability, meaning adversaries can trigger the buffer overflow without requiring physical access to the device or local network presence.
The technical implementation of this vulnerability involves a classic stack-based buffer overflow scenario where the sub_4237AC function fails to properly validate the length of user-supplied input data from the submit-url parameter. When an attacker crafts a malicious payload that exceeds the allocated buffer size, the excess data overflows into adjacent memory locations, potentially corrupting the stack frame and allowing arbitrary code execution. This type of vulnerability is classified under CWE-121 Stack-based Buffer Overflow, which is a fundamental weakness in memory management that has been consistently identified as a critical threat vector in network device security. The attack surface is particularly concerning as it targets the web interface configuration endpoint, making it accessible through standard HTTP protocols.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete device compromise and potential network infiltration. An attacker who successfully exploits this flaw could gain administrative privileges on the D-Link DWR-M960 router, enabling them to modify network configurations, redirect traffic, install malware, or establish persistent backdoors. The published exploit code significantly lowers the barrier to entry for threat actors, making this vulnerability particularly dangerous in environments where such devices are deployed without proper network segmentation or monitoring. The LTE Configuration Endpoint represents a critical management interface that handles sensitive network parameters, making the compromise of this component especially damaging to overall network security posture.
Mitigation strategies for CVE-2026-2926 should prioritize immediate firmware updates from D-Link, as the vendor has likely released patches addressing this specific vulnerability. Network administrators must also implement defensive measures including firewall rules that restrict access to the affected web interface, network segmentation to isolate critical devices, and continuous monitoring for suspicious traffic patterns. The ATT&CK framework categorizes this type of vulnerability under T1059 Command and Scripting Interpreter and T1210 Exploitation of Remote Services, highlighting the need for comprehensive network defense strategies. Additional protective measures include disabling unnecessary services, implementing strong authentication mechanisms, and conducting regular vulnerability assessments to identify similar weaknesses in network infrastructure. Organizations should also consider network traffic analysis to detect potential exploitation attempts and maintain detailed incident response procedures for handling such security events.