CVE-2025-70796: WTI Web Interface Path Traversal Flaw

CVE-2025-70796 Overview

CVE-2025-70796 is an unauthenticated path traversal vulnerability in the web management interface of Wireless Technology, Inc. (WTI) devices running version 3.5.0.r 2024/05/24 00:00:00. Attackers can craft HTTP requests containing directory traversal sequences to read files outside the intended web root. The flaw requires no authentication and can be exploited remotely over the network. Successful exploitation exposes sensitive system files and configuration data, including credentials and device configuration that support follow-on attacks. The weakness is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory.

Critical Impact
An unauthenticated remote attacker can read arbitrary files from affected WTI devices, disclosing configuration data and secrets that facilitate lateral movement and full device compromise.

Affected Products

Wireless Technology, Inc. (WTI) devices with web management interface
WTI firmware version 3.5.0.r 2024/05/24 00:00:00
Deployments exposing the WTI web management interface to untrusted networks

Discovery Timeline

2026-07-10 - CVE-2025-70796 published to NVD
2026-07-10 - Last updated in NVD database

Technical Details for CVE-2025-70796

Vulnerability Analysis

The vulnerability resides in HTTP request handling within the WTI web management interface. The server accepts user-supplied path components in requests without properly canonicalizing or validating them. An attacker submits traversal sequences such as ../ to escape the intended web root and reach arbitrary paths on the underlying filesystem.

Because the interface performs no authentication check before serving the affected requests, exploitation requires only network reachability to the management port. This is common on appliances deployed in data centers and remote sites, where the management interface is often reachable from adjacent networks. Read access to files like device configuration, credential stores, and system logs supports credential theft and expands the blast radius beyond information disclosure alone.

Root Cause

The root cause is improper limitation of a pathname to a restricted directory [CWE-22]. The web server concatenates attacker-controlled input into a filesystem path without filtering ../ sequences, encoded variants, or absolute paths. The interface also lacks authentication controls that would gate file-serving handlers behind a session check.

Attack Vector

Exploitation is remote and unauthenticated. An attacker sends a crafted HTTP request to the WTI web management endpoint with traversal sequences in the URL path or a file parameter. The server resolves the path outside the web root and returns the requested file contents in the HTTP response. No user interaction is required. Refer to the public CVE summary and project repository for the request pattern.

Detection Methods for CVE-2025-70796

Indicators of Compromise

HTTP request logs containing ../, ..%2f, ..%5c, or double-encoded traversal sequences targeting the WTI web interface
Requests referencing sensitive absolute paths such as /etc/passwd, /etc/shadow, or device configuration files
Unusual outbound reads of configuration files followed by authentication attempts from new source addresses
Access to the WTI management interface from unexpected external IP addresses

Detection Strategies

Deploy web application firewall or IDS signatures that flag path traversal patterns in URIs targeting WTI management ports
Alert on any unauthenticated 200-response HTTP transactions to the WTI interface that return non-HTML content
Correlate access logs from the WTI interface with subsequent authentication events on adjacent systems to surface credential reuse

Monitoring Recommendations

Forward WTI web interface access logs to a centralized logging or SIEM platform for retention and analysis
Monitor for spikes in 4xx and 5xx responses that may indicate traversal probing prior to a successful request
Track administrative access to the WTI interface and alert on connections from sources outside the management network

How to Mitigate CVE-2025-70796

Immediate Actions Required

Restrict network access to the WTI web management interface to trusted management subnets using ACLs or firewall rules
Disable the web management interface where CLI or serial console management is sufficient
Rotate any credentials, SNMP community strings, and shared secrets stored on affected devices, assuming disclosure
Review historical access logs for prior exploitation attempts using traversal patterns

Patch Information

No vendor patch has been published in the referenced advisories at the time of NVD publication. Consult Wireless Technology, Inc. directly for firmware updates addressing version 3.5.0.r 2024/05/24 00:00:00. Track updates through the public CVE summary.

Workarounds

Place the WTI management interface behind a VPN or jump host and block direct internet exposure
Apply upstream reverse proxy rules that reject requests containing ../, ..\\, or encoded traversal sequences
Segment WTI devices into an isolated management VLAN with strict egress filtering
Enable device access logging and export logs off-box for tamper-resistant retention

bash

# Example iptables rule limiting WTI management access to a trusted subnet
iptables -A INPUT -p tcp --dport 80 -s 10.10.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 10.10.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP