Horizon Alert
Summary of the vulnerability and why it matters
This vulnerability allows unauthenticated remote attackers to run commands on the WDR201A WiFi Extender. This is possible by sending a specially crafted request to the device's web interface.
- Attackers can gain control of the device.
- This impacts devices reachable from the internet.
Attack Path
How an attacker could exploit the issue
An unauthenticated remote attacker can exploit this flaw by sending a specially crafted POST request to the device's web interface. By injecting shell metacharacters into the `reboot_time` parameter within the `adm.cgi` binary, an attacker can bypass intended functionality and achieve arbitrary command execution on the device.
- Target is the web management interface.
- Exploitable via unauthenticated network requests.
- Requires `reboot_enabled=1` setting.
Live Threat
Current exploitation, exposure, and threat context
This command injection vulnerability in a WiFi extender's web interface appears to be a straightforward target for attackers. The ease of exploitation without authentication, coupled with the potential for remote code execution, makes it attractive for widespread, automated attacks if the device is internet-facing. However, there is no immediate evidence of active exploitation or inclusion on threat intelligence lists.
- No public exploit available.
- No KEV signal.
- Vulnerability was recently disclosed.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
Prioritize isolating or taking offline any WDR201A WiFi Extenders due to an unauthenticated remote OS command injection vulnerability. This critical flaw allows attackers to execute arbitrary shell commands, posing a significant risk to your network infrastructure. Given the ease of exploitation and potential for widespread compromise, immediate action is paramount.
- Block network access to the device.
- Monitor network traffic for unusual outbound connections.
- Investigate alternative secure access methods if needed.
