CVE-2026-4468 in CF-AC100
Summary
by MITRE • 03/20/2026
A vulnerability was determined in Comfast CF-AC100 2.6.0.8. Affected is an unknown function of the file /cgi-bin/mbox-config?method=SET§ion=update_interface_png. This manipulation causes command injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 03/23/2026
The vulnerability identified as CVE-2026-4468 represents a critical command injection flaw within the Comfast CF-AC100 wireless router firmware version 2.6.0.8. This issue resides in the web interface component located at /cgi-bin/mbox-config?method=SET§ion=update_interface_png, where an insufficient input validation mechanism fails to properly sanitize user-supplied data before processing. The affected function processes configuration parameters without adequate sanitization, creating a pathway for malicious actors to inject arbitrary commands into the underlying operating system. This type of vulnerability falls under the CWE-77 category, specifically representing a command injection weakness where untrusted data is directly executed as system commands.
The remote exploitation capability of this vulnerability significantly amplifies its threat level, as attackers can leverage network-based attacks to compromise the device without requiring physical access. The public disclosure of this exploit means that threat actors can readily utilize existing attack vectors to target vulnerable Comfast CF-AC100 devices, potentially leading to full system compromise. The attack surface is particularly concerning given that the affected router is a consumer-grade device that often operates in unsecured network environments where additional security layers may be absent. According to ATT&CK framework, this vulnerability maps to T1059.001 - Command and Scripting Interpreter: PowerShell, and T1021.001 - Remote Services: Remote Desktop Protocol, as the command injection allows for arbitrary execution of system commands on the target device.
The operational impact of this vulnerability extends beyond simple unauthorized access, as successful exploitation could enable attackers to gain root privileges on the affected router, potentially allowing them to modify network configurations, redirect traffic, or establish persistent backdoors within the network infrastructure. The compromised device could serve as a pivot point for further attacks against internal network resources, making this vulnerability particularly dangerous in enterprise or home network environments where routers often serve as gateways to broader network ecosystems. Network monitoring systems may not immediately detect such attacks as they appear as legitimate system processes, complicating detection and response efforts.
Security mitigation strategies should prioritize immediate firmware updates from Comfast if available, though the vendor's lack of response to early disclosure concerns presents a significant challenge. Network segmentation and firewall rules should be implemented to restrict access to the router's administrative interface, particularly from untrusted networks. Additional protective measures include disabling unnecessary services, implementing strong authentication mechanisms, and conducting regular security audits of network infrastructure. The vulnerability highlights the critical importance of firmware security updates and vendor responsibility in maintaining secure network equipment, as the lack of vendor response leaves users exposed to ongoing exploitation risks. Organizations should consider implementing intrusion detection systems specifically configured to monitor for command injection patterns and unusual network behavior that might indicate exploitation attempts against similar network infrastructure devices.