CVE-2025-12944 in DGN2200v4
Summary
by MITRE • 11/11/2025
Improper input validation in NETGEAR DGN2200v4 (N300 Wireless ADSL2+ Modem Router) allows attackers with direct network access to the device to potentially execute code on the device.
Please check the firmware version and update to the latest.
Fixed in:
DGN2200v4 firmware 1.0.0.132 or later
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Analysis
by VulDB Data Team • 12/08/2025
The vulnerability identified as CVE-2025-12944 represents a critical security flaw in NETGEAR DGN2200v4 wireless modem routers that stems from improper input validation within the device's firmware implementation. This weakness specifically affects the N300 Wireless ADSL2+ Modem Router model, which is widely deployed in residential and small office environments. The vulnerability arises when the device fails to properly validate user-supplied input parameters, creating an opportunity for malicious actors to exploit the system through crafted inputs that bypass normal security controls.
The technical nature of this flaw places it squarely within CWE-20, which describes improper input validation as a fundamental security weakness where software does not properly validate or sanitize input data before processing. Attackers with direct network access to the vulnerable device can potentially leverage this weakness to execute arbitrary code on the router's operating system. This type of vulnerability falls under the ATT&CK framework's technique T1059, specifically targeting command and script injection, where adversaries can manipulate the system through input manipulation to gain unauthorized execution privileges.
The operational impact of this vulnerability is severe as it allows for complete system compromise of the affected router. Once an attacker successfully exploits this weakness, they can potentially gain full administrative control over the device, enabling them to modify network configurations, intercept traffic, redirect connections, or establish persistent access points. The vulnerability's exploitation requires only direct network access, making it particularly dangerous as it does not require complex network positioning or advanced attack vectors. This accessibility increases the likelihood of successful exploitation in environments where physical or network access is possible.
The remediation for this vulnerability is straightforward but critical for maintaining device security. NETGEAR has addressed this issue through firmware version 1.0.0.132 and later releases, which contain proper input validation mechanisms that prevent the exploitation of this weakness. System administrators and users must immediately update their DGN2200v4 routers to the latest firmware version to mitigate the risk of exploitation. The update process should be performed carefully, as router firmware updates can potentially disrupt network connectivity if not executed properly. Organizations should also implement network monitoring to detect any suspicious activity that might indicate exploitation attempts, particularly focusing on unusual network traffic patterns or unauthorized configuration changes that could indicate successful compromise of the device.