CVE-2026-2823 is a remote command injection vulnerability identified in the Comfast CF-E7 wireless device firmware version 2.6.0.9. The flaw exists in the web management interface component 'webmggnt', specifically within the function sub_41ACCC that processes requests to the CGI endpoint /cgi-bin/mbox-config with parameters method=SET and section=ntp_timezone. The vulnerability stems from insufficient input validation or sanitization of the 'timestr' parameter, which an attacker can manipulate to inject arbitrary shell commands. This injection allows execution of commands with the privileges of the web management process, which typically runs with elevated permissions, potentially leading to full device compromise. The attack vector is remote and does not require user interaction, but does require low-level privileges (likely authenticated or with some access). The vendor was notified early but has not responded or provided a patch, and a public exploit has been released, increasing the risk of exploitation. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L), no user interaction (UI:N), and low impact on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). This suggests the vulnerability is moderately easy to exploit but with limited direct impact on core security properties, though device compromise could lead to broader network risks. The lack of vendor response and patch availability means users must rely on mitigations until an official fix is issued.

The primary impact of CVE-2026-2823 is unauthorized remote command execution on affected Comfast CF-E7 devices, which can lead to full device compromise. Attackers exploiting this vulnerability could execute arbitrary commands, potentially altering device configurations, installing malware, or pivoting to internal networks. This can result in loss of confidentiality, integrity, and availability of the device and connected systems. Organizations relying on these devices for wireless connectivity or network infrastructure may face service disruptions, data breaches, or lateral movement by attackers. Given the device's role in network access, compromise could facilitate further attacks on internal resources. The medium CVSS score reflects moderate impact, but the availability of a public exploit and lack of patch increase the risk of exploitation. The absence of vendor remediation prolongs exposure, especially in environments where these devices are widely deployed. The threat is particularly significant for organizations with limited network segmentation or monitoring, as attackers could leverage this vulnerability to establish persistent footholds.

1. Immediately isolate Comfast CF-E7 devices running version 2.6.0.9 from untrusted networks, especially the internet, to reduce exposure. 2. Restrict access to the web management interface to trusted IP addresses via firewall rules or access control lists. 3. Disable remote management features if not required, or restrict them to secure VPN connections. 4. Monitor network traffic and device logs for unusual activity or commands executed via the vulnerable endpoint. 5. Employ network segmentation to limit the impact of a compromised device on critical infrastructure. 6. If possible, replace affected devices with alternative hardware from vendors with active security support. 7. Regularly check for vendor updates or advisories and apply patches promptly once available. 8. Consider deploying intrusion detection/prevention systems (IDS/IPS) with signatures targeting this vulnerability or exploit patterns. 9. Educate IT staff about this vulnerability and the importance of securing device management interfaces. 10. As a temporary workaround, if feasible, block or filter HTTP requests to the vulnerable CGI endpoint on the device.