CVE-2025-15607: TP-Link Archer AX53 Firmware RCE Flaw

CVE-2025-15607 Overview

CVE-2025-15607 is a command injection vulnerability [CWE-77] in the TP-Link Archer AX53 v1 wireless router. The flaw resides in the mscd debug functionality, which fails to properly handle user input. Authenticated attackers on an adjacent network can redirect log output to arbitrary files and concatenate unvalidated file contents into shell commands. Successful exploitation allows arbitrary command execution and may result in full device compromise.

Critical Impact

Authenticated attackers on the adjacent network can execute arbitrary shell commands on affected Archer AX53 v1 devices, potentially gaining full control over the router and the traffic it processes.

Affected Products

• TP-Link Archer AX53 (hardware v1)
• TP-Link Archer AX53 Firmware v1.0
• TP-Link Archer AX53 series routers running vulnerable mscd debug component

Discovery Timeline

• 2026-03-20 - CVE-2025-15607 published to the National Vulnerability Database
• 2026-04-02 - Last updated in NVD database

Technical Details for CVE-2025-15607

Vulnerability Analysis

The vulnerability exists in the mscd daemon's debug interface on the Archer AX53 v1. The debug functionality accepts attacker-controlled input that is incorporated into shell commands without proper sanitization. This corresponds to CWE-77 (Improper Neutralization of Special Elements used in a Command). Because the device runs mscd with elevated privileges, injected commands execute with the same level of access, providing a direct path to firmware-level compromise.

An attacker must already be authenticated and located on an adjacent network, such as the Wi-Fi network served by the router or a directly connected LAN segment. Once those preconditions are met, exploitation requires only standard HTTP or proprietary management requests to the debug endpoint.

Root Cause

The root cause is insufficient input validation in two stages of the mscd debug logic. First, the component permits log output to be redirected to arbitrary file paths chosen by the caller. Second, the contents of those files are later concatenated into shell command strings that are passed to a system shell. The combination converts a write primitive into a command execution primitive, since the attacker controls both the destination of the write and the data placed inside it.

Attack Vector

Exploitation proceeds in three stages. The attacker authenticates to the device and reaches the mscd debug functionality from an adjacent network. The attacker then triggers a log redirection that writes attacker-controlled content into a file consumed by a subsequent shell command. Finally, the attacker invokes the function that concatenates that file content into a shell invocation, causing the injected payload to run on the underlying operating system. No specific exploitation code or public proof-of-concept is currently available for CVE-2025-15607. Refer to the TP-Link FAQ Support for vendor technical context.

Detection Methods for CVE-2025-15607

Indicators of Compromise

• Unexpected files written into mscd log paths or other system directories on the router file system.
• Outbound connections from the router to unfamiliar IP addresses, particularly on ports associated with reverse shells or tunneling.
• Modifications to router configuration, DNS settings, or firmware checksums that do not match a known administrator change window.
• Repeated authenticated requests to mscd debug endpoints from a single LAN or Wi-Fi client.

Detection Strategies

• Inspect router system logs for log-redirection operations targeting non-default paths or writable directories used by shell helpers.
• Correlate administrative authentication events with subsequent invocations of debug or diagnostic functionality.
• Monitor wireless and LAN segments for clients issuing management-plane traffic that does not match expected administrative workstations.

Monitoring Recommendations

• Forward router syslog and authentication events to a centralized logging platform for retention and correlation.
• Alert on configuration changes, firmware version mismatches, and new outbound connections originating from the router itself.
• Track Wi-Fi association events and pair them with subsequent management interface access to identify unauthorized adjacent-network actors.

How to Mitigate CVE-2025-15607

Immediate Actions Required

• Apply the latest firmware update for the Archer AX53 v1 published on the TP-Link Firmware Download page.
• Rotate the router administrative password and any Wi-Fi pre-shared keys, since exploitation requires authenticated access from an adjacent network.
• Disable remote management and any non-essential debug or diagnostic interfaces exposed by the device.
• Audit connected clients and remove unknown devices from the wireless and wired networks.

Patch Information

TP-Link has published firmware updates and vendor guidance for the Archer AX53 v1. Refer to the TP-Link FAQ Support article and the TP-Link Firmware Download portal to obtain the corrected firmware image. Verify the firmware version after upgrade to confirm that the vulnerable mscd debug behavior has been remediated.

Workarounds

• Restrict administrative access to the router to a dedicated management VLAN or wired port, preventing routine Wi-Fi clients from reaching management interfaces.
• Enforce strong, unique administrative credentials and enable account lockout where supported to slow authenticated attacks.
• Segment IoT and guest devices onto isolated SSIDs so that compromise of a single client cannot pivot to the router management plane.

# Configuration example: limit management access to a single trusted host
# (apply via the router web UI; values shown for illustration)
management_access_allowed_hosts = "192.0.2.10/32"
remote_management_enabled = false
wifi_management_access_enabled = false