CVE-2025-15518: TP-Link Archer NX Series RCE Vulnerability

CVE-2025-15518 Overview

CVE-2025-15518 is a command injection vulnerability affecting the wireless-control administrative CLI command on multiple TP-Link Archer NX series routers. The vulnerability arises from improper input handling, allowing crafted input to be executed as part of an operating system command. An authenticated attacker with administrative privileges can exploit this flaw to execute arbitrary commands on the underlying operating system, potentially compromising the confidentiality, integrity, and availability of the affected device.

Critical Impact
Authenticated administrators can achieve arbitrary command execution on the router's operating system through the wireless-control CLI command, enabling full device compromise including configuration theft, backdoor installation, and network pivot attacks.

Affected Products

TP-Link Archer NX200
TP-Link Archer NX210
TP-Link Archer NX500
TP-Link Archer NX600

Discovery Timeline

March 23, 2026 - CVE-2025-15518 published to NVD
March 24, 2026 - Last updated in NVD database

Technical Details for CVE-2025-15518

Vulnerability Analysis

This vulnerability is classified under CWE-78 (Improper Neutralization of Special Elements used in an OS Command), commonly known as OS Command Injection. The flaw exists within the wireless-control functionality accessible through the router's administrative command-line interface.

When processing user-supplied input for wireless configuration parameters, the CLI fails to properly sanitize or validate special characters and shell metacharacters. This allows an attacker to break out of the intended command context and inject additional operating system commands that execute with the privileges of the underlying system process.

Given that the attack vector requires adjacent network access, an attacker must be on the same network segment as the target device. Additionally, the attacker must possess valid administrative credentials, meaning the vulnerability is limited to scenarios where administrator access has already been obtained, whether through legitimate means, credential theft, or other attack vectors.

Root Cause

The root cause stems from improper input handling in the wireless-control administrative CLI command. User-controlled input is passed directly to shell command execution without adequate sanitization or validation. The application fails to neutralize shell metacharacters such as semicolons (;), pipes (|), backticks (`), or command substitution sequences ($()) before incorporating user input into system commands.

Attack Vector

The attack requires adjacent network access and administrative authentication to the device's CLI interface. Once authenticated, an attacker can craft malicious input containing shell metacharacters that escape the intended command context. The injected commands execute with the privileges of the router's operating system, typically running as root on embedded Linux systems.

A typical exploitation scenario involves:

Gaining administrative access to the router CLI (via SSH, Telnet, or serial console)
Navigating to the wireless-control configuration command
Injecting shell metacharacters alongside legitimate input parameters
The injected commands execute on the underlying operating system

The vulnerability mechanism involves insufficient input validation in the wireless-control CLI command. When an administrator provides configuration parameters, the input is incorporated into shell commands without proper sanitization of special characters. Attackers can leverage shell metacharacters to append or chain additional commands that execute with system privileges. For detailed technical information, refer to the TP-Link FAQ Document.

Detection Methods for CVE-2025-15518

Indicators of Compromise

Unusual processes spawned from router CLI or web management services
Unexpected outbound network connections from the router to external IP addresses
Modified firmware or configuration files on the device
Administrative login events from unexpected IP addresses or at unusual times
Evidence of shell metacharacters in wireless configuration logs

Detection Strategies

Monitor administrative authentication logs for anomalous login patterns or brute-force attempts
Implement network traffic analysis to detect unusual command-and-control communications originating from network infrastructure devices
Deploy file integrity monitoring solutions to detect unauthorized changes to router firmware or configuration
Review CLI command history logs for suspicious input patterns containing shell metacharacters

Monitoring Recommendations

Enable comprehensive logging on all TP-Link Archer NX series devices and forward logs to a centralized SIEM
Monitor for unexpected reboot events or configuration changes on affected routers
Implement alerting on administrative access attempts from non-standard management networks
Conduct regular firmware version audits to ensure devices are running patched versions

How to Mitigate CVE-2025-15518

Immediate Actions Required

Update affected TP-Link Archer NX series routers to the latest available firmware version immediately
Restrict administrative access to trusted management networks only using firewall rules or VLAN segmentation
Audit and rotate administrative credentials on all affected devices
Review administrative access logs for signs of exploitation

Patch Information

TP-Link has released firmware updates to address this vulnerability. Administrators should download and install the latest firmware from the official TP-Link support pages:

Additional guidance is available in the TP-Link FAQ Document.

Workarounds

Disable remote CLI access (SSH/Telnet) and only allow local console access for administrative tasks
Implement network segmentation to isolate management interfaces from untrusted network segments
Deploy strong multi-factor authentication mechanisms where supported for administrative access
Restrict administrative accounts to the minimum number necessary and use strong, unique passwords

bash

# Example network segmentation configuration
# Restrict management access to dedicated VLAN
# Configure on upstream switch/firewall

# Create management VLAN
vlan 100 name MGMT-VLAN

# Assign router management interface to VLAN 100
# Apply ACL to permit only trusted admin workstations
access-list 101 permit ip 10.100.0.0 0.0.0.255 host 192.168.1.1
access-list 101 deny ip any host 192.168.1.1

# Apply to interface
interface GigabitEthernet0/1
  ip access-group 101 in