CVE-2025-14756 Overview
A command injection vulnerability has been discovered in the admin interface component of TP-Link Archer MR600 v5 firmware. This security flaw allows authenticated attackers with administrative privileges to execute arbitrary system commands on the underlying operating system. The vulnerability can be exploited through crafted input in the browser developer console, with a limited character length constraint. Successful exploitation could lead to service disruption or complete device compromise.
Critical Impact
Authenticated attackers on the adjacent network can execute system commands on TP-Link Archer MR600 v5 routers, potentially leading to full device takeover, network traffic interception, or denial of service.
Affected Products
- TP-Link Archer MR600 v5 (firmware versions prior to patched release)
- TP-Link Archer MR600 v5 LTE Router
Discovery Timeline
- 2026-01-26 - CVE-2025-14756 published to NVD
- 2026-01-27 - Last updated in NVD database
Technical Details for CVE-2025-14756
Vulnerability Analysis
This command injection vulnerability (CWE-77) exists within the administrative web interface of the TP-Link Archer MR600 v5 router. The flaw stems from improper neutralization of special elements used in command construction. When an authenticated administrator interacts with specific input fields through the browser developer console, the application fails to adequately sanitize user-supplied data before passing it to system-level command execution functions.
The attack requires adjacency to the target network and administrative authentication, which provides some mitigation against remote exploitation. However, once an attacker gains authenticated access—whether through credential theft, weak passwords, or social engineering—they can leverage this vulnerability to execute commands with the privileges of the router's underlying operating system.
Root Cause
The root cause of this vulnerability is improper input validation and sanitization in the admin interface component. The firmware fails to properly neutralize special characters and command separators before incorporating user input into system commands. This allows specially crafted input containing shell metacharacters to break out of the intended command context and execute attacker-controlled commands on the device.
Attack Vector
The attack vector requires adjacent network access and authenticated administrative privileges on the target device. An attacker must first gain access to the local network segment where the TP-Link router operates. Once positioned on the adjacent network and authenticated to the admin interface, the attacker can inject malicious commands through the browser developer console.
The exploitation involves crafting input containing command injection payloads, though there is a character length limitation that constrains the complexity of injectable commands. Despite this limitation, attackers can potentially chain multiple requests or use abbreviated commands to achieve their objectives, including establishing persistent access, modifying network configurations, or disrupting router services.
Detection Methods for CVE-2025-14756
Indicators of Compromise
- Unusual administrative login attempts or sessions from unexpected network locations
- Unexpected modifications to router configuration files or system settings
- Anomalous outbound connections from the router to external IP addresses
- Unexplained changes to DNS settings or routing tables on the device
Detection Strategies
- Monitor admin interface access logs for unusual patterns or repeated login attempts
- Implement network monitoring to detect anomalous traffic originating from the router
- Deploy intrusion detection systems to identify command injection attack signatures
- Review router configuration changes regularly for unauthorized modifications
Monitoring Recommendations
- Enable and centralize logging for all administrative access to the TP-Link router
- Configure alerts for admin interface access outside of normal maintenance windows
- Monitor for unexpected firmware or configuration changes on network devices
- Implement network segmentation to limit lateral movement if the router is compromised
How to Mitigate CVE-2025-14756
Immediate Actions Required
- Update the TP-Link Archer MR600 v5 firmware to the latest available version immediately
- Change administrative credentials using strong, unique passwords
- Restrict administrative interface access to trusted IP addresses where possible
- Disable remote management features if not required for operations
Patch Information
TP-Link has released firmware updates to address this vulnerability. Administrators should download and apply the latest firmware from the official TP-Link Firmware Download page. Additional guidance is available through the TP-Link Support FAQ. For detailed vulnerability information, refer to the JVN Security Advisory.
Workarounds
- Restrict network access to the administrative interface using firewall rules
- Implement network segmentation to isolate router management interfaces
- Disable browser developer console access on machines used for router administration where feasible
- Monitor and limit the number of users with administrative access to the device
# Configuration example - Network ACL to restrict admin access
# On upstream firewall or network device, restrict access to router admin interface
# Allow only trusted management workstations to access the router's web interface
# Example iptables rule to restrict access to router admin interface (192.168.1.1)
iptables -A FORWARD -d 192.168.1.1 -p tcp --dport 80 -s 192.168.1.100 -j ACCEPT
iptables -A FORWARD -d 192.168.1.1 -p tcp --dport 443 -s 192.168.1.100 -j ACCEPT
iptables -A FORWARD -d 192.168.1.1 -p tcp --dport 80 -j DROP
iptables -A FORWARD -d 192.168.1.1 -p tcp --dport 443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
