CVE-2025-26237 Overview
CVE-2025-26237 is a command injection vulnerability affecting the D-Link DI-7001 MINI_5G router running firmware version 19.10.31A1. The flaw resides in the flag parameter of the msp_info endpoint. Attackers can inject shell metacharacters into this parameter to execute arbitrary operating system commands on the underlying device.
Successful exploitation grants command execution in the context of the router's web management process, which typically runs with elevated privileges on embedded devices. This provides a foothold for network pivoting, credential theft, and persistent implant deployment on affected D-Link hardware.
Critical Impact
Attackers reaching the router's management interface can execute arbitrary commands through the flag parameter, gaining control of the device and its network position.
Affected Products
- D-Link DI-7001 MINI_5G router
- Firmware version 19.10.31A1
- msp_info web management endpoint
Discovery Timeline
- 2026-08-24 - CVE-2025-26237 published to NVD
- 2026-08-24 - Last updated in NVD database
Technical Details for CVE-2025-26237
Vulnerability Analysis
The vulnerability affects the msp_info handler in the D-Link DI-7001 MINI_5G web management interface. The handler accepts a flag parameter from HTTP requests and passes its value into a system shell without sanitization or safe-execution APIs. This behavior aligns with the [CWE-78] operating system command injection weakness class common in embedded router firmware.
Because the router's HTTP daemon typically executes as root on embedded Linux, injected commands inherit those privileges. This gives attackers full control of firmware, routing configuration, DNS settings, and any credentials stored on the device.
Root Cause
The root cause is unsafe concatenation of user-controlled input into a shell command executed by the msp_info handler. The flag parameter is not validated against an allowlist, and shell metacharacters such as ;, |, &, and backticks are not neutralized before execution.
Attack Vector
An attacker sends a crafted HTTP request to the msp_info endpoint containing shell metacharacters in the flag parameter. The injected payload executes on the device shell after the request reaches the vulnerable handler. Technical proof-of-concept details are documented in the public GitHub CVE Analysis for DI_7001_MINI_5G.
Exposure depends on whether the management interface is reachable from the LAN, WAN, or both. Devices with remote administration enabled face internet-facing risk.
Detection Methods for CVE-2025-26237
Indicators of Compromise
- HTTP requests to the msp_info endpoint containing shell metacharacters (;, |, &, `, $() in the flag parameter.
- Unexpected outbound connections from the router to unknown hosts following management interface access.
- New processes, cron entries, or modified /etc/ files on the device not aligned with vendor firmware images.
Detection Strategies
- Inspect web server and reverse proxy logs for msp_info requests carrying non-alphanumeric flag values.
- Deploy network intrusion detection signatures matching command injection patterns targeting D-Link management URIs.
- Compare device firmware hashes against known-good vendor images to identify tampering.
Monitoring Recommendations
- Forward router syslog and HTTP access logs to a centralized SIEM for correlation with endpoint telemetry.
- Alert on management interface access from unexpected source addresses or outside change windows.
- Baseline outbound traffic from network infrastructure devices and flag deviations.
How to Mitigate CVE-2025-26237
Immediate Actions Required
- Restrict access to the DI-7001 MINI_5G management interface to trusted administrative networks only.
- Disable remote WAN administration until a vendor patch is confirmed installed.
- Rotate administrative credentials and any secrets that traversed the device.
Patch Information
No vendor advisory or patched firmware version is listed in the enriched CVE data at publication. Administrators should monitor the D-Link security bulletin site for firmware updates addressing the msp_infoflag parameter and apply them once available.
Workarounds
- Place the router behind a segmentation firewall that blocks untrusted access to the HTTP management port.
- Enforce access control lists restricting the management interface to a dedicated administrative VLAN.
- Consider replacing end-of-support D-Link models if no firmware fix is released.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
