CVE-2024-8574 Overview
CVE-2024-8574 is an operating system command injection vulnerability in the TOTOLINK AC1200 T8 router running firmware version 4.1.5cu.861_B20230220. The flaw resides in the setParentalRules function within /cgi-bin/cstecgi.cgi. An attacker can manipulate the slaveIpList argument to inject arbitrary OS commands. The attack is initiated remotely over the network and requires low-privilege authentication. Public exploit details have been disclosed, increasing the risk of opportunistic exploitation. According to the CVE record, the vendor was contacted but did not respond to the disclosure, leaving affected devices without an official patch.
Critical Impact
Authenticated remote attackers can execute arbitrary operating system commands on affected TOTOLINK T8 routers through the slaveIpList parameter, potentially leading to full device compromise.
Affected Products
- TOTOLINK AC1200 T8 hardware device
- TOTOLINK T8 firmware version 4.1.5cu.861_B20230220
- Deployments exposing the /cgi-bin/cstecgi.cgi management endpoint
Discovery Timeline
- 2024-09-08 - CVE-2024-8574 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-8574
Vulnerability Analysis
The vulnerability is classified as an OS command injection weakness [CWE-78]. It affects the setParentalRules handler exposed through the CGI binary /cgi-bin/cstecgi.cgi on the TOTOLINK T8 router. The handler accepts a slaveIpList parameter that is passed to an underlying shell context without proper sanitization or escaping. Attackers who can reach the router's HTTP management interface can supply shell metacharacters inside slaveIpList and execute commands with the privileges of the CGI process, which typically runs as root on embedded consumer routers.
Exploitation results in loss of confidentiality, integrity, and availability on the device. Successful attackers can pivot into the local network, capture traffic, alter DNS or routing settings, or persist malware on the device.
Root Cause
The root cause is missing input validation on user-supplied data. The setParentalRules function concatenates the slaveIpList value into a system command string rather than treating it as data. Because no allowlist, sanitization routine, or safe API is applied, injected shell metacharacters such as ;, |, or backticks are interpreted by the underlying shell.
Attack Vector
The attack vector is network-based. An attacker sends a crafted HTTP POST request to /cgi-bin/cstecgi.cgi targeting the setParentalRules topic with a malicious slaveIpList value. Where the router's management interface is exposed to the WAN or accessible from a compromised LAN client, exploitation can be performed without physical access. The published EPSS probability of 3.077% (86th percentile) reflects meaningful attacker interest relative to the broader CVE population.
See the GitHub IoT vulnerability write-up for TOTOLINK AC1200 T8 and the VulDB entry #276808 for further technical context.
Detection Methods for CVE-2024-8574
Indicators of Compromise
- HTTP POST requests to /cgi-bin/cstecgi.cgi containing the setParentalRules topic and shell metacharacters (;, |, &, backticks) inside slaveIpList
- Unexpected outbound connections initiated by the router to attacker-controlled hosts
- Modified firewall, DNS, or routing configurations on the device that were not made by administrators
- New or unknown processes running on the router console when accessible
Detection Strategies
- Inspect web server and CGI logs on the router for anomalous setParentalRules requests with non-IP characters in slaveIpList
- Deploy network intrusion detection signatures that flag command metacharacters in POST bodies to /cgi-bin/cstecgi.cgi
- Correlate router management-plane traffic with outbound egress patterns that deviate from baseline
Monitoring Recommendations
- Restrict administrative access to the router and log every request to the CGI interface
- Alert on management-interface access originating from untrusted VLANs or from the WAN
- Track firmware and configuration state so that unauthorized changes trigger notification
How to Mitigate CVE-2024-8574
Immediate Actions Required
- Disable remote WAN management on affected TOTOLINK T8 devices and restrict LAN access to trusted administrator hosts
- Change default credentials and enforce strong authentication on the router's web interface
- Segment vulnerable routers away from sensitive assets until a vendor patch is available
- Monitor the TOTOLINK official website for firmware updates addressing this CVE
Patch Information
No official vendor patch is referenced in the CVE record. The disclosure notes the vendor was contacted but did not respond. Organizations should treat affected units as unpatched and consider replacement with a supported device if the vendor does not issue a fix.
Workarounds
- Block external access to TCP ports serving the router administrative interface at the upstream firewall
- Place vulnerable devices behind a network access control policy that permits management traffic only from a dedicated admin subnet
- Where feasible, replace the affected TOTOLINK T8 with a router that receives active security maintenance
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
