CVE-2025-2959 Overview
CVE-2025-2959 affects the TRENDnet TEW-410APB wireless access point running firmware version 1.3.06b. The vulnerability resides in the sub_4019A0 function within /usr/sbin/httpd, the device's HTTP request handler. A crafted request triggers a null pointer dereference [CWE-476] and improper resource shutdown [CWE-404], crashing the service.
An attacker on the adjacent network can send a specially formed HTTP request to disrupt the device management interface. The vendor was contacted prior to public disclosure but did not respond. Technical details have been publicly disclosed.
Critical Impact
An unauthenticated attacker on the local network can crash the embedded HTTP server, disabling device management and administrative access to the access point.
Affected Products
- TRENDnet TEW-410APB wireless access point (hardware)
- TRENDnet TEW-410APB firmware version 1.3.06b
- Any deployment exposing the /usr/sbin/httpd management interface on an adjacent network
Discovery Timeline
- 2025-03-30 - CVE-2025-2959 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-2959
Vulnerability Analysis
The flaw exists in the sub_4019A0 function of the embedded httpd binary shipped with TEW-410APB firmware 1.3.06b. The function processes incoming HTTP requests but fails to validate a pointer before dereferencing it. When the expected input element is missing or malformed, the pointer remains null and the subsequent memory access terminates the httpd process.
The weakness is classified under both Null Pointer Dereference [CWE-476] and Improper Resource Shutdown or Release [CWE-404]. The result is a reliable denial-of-service condition against the device's web management interface. Loss of management access can prevent administrators from applying configuration changes or monitoring the device.
Exploitation requires network adjacency; the attacker must be able to reach the HTTP port on the access point's management interface. No authentication or user interaction is required.
Root Cause
The root cause is missing input validation in sub_4019A0. The function assumes that a parser or lookup routine returns a valid pointer and does not check for a null return value before dereferencing it. In embedded httpd implementations typical of consumer wireless hardware, missing header fields, truncated bodies, or unexpected URI structures commonly trigger this class of defect.
Attack Vector
The attack vector is the HTTP management interface exposed on the access point's LAN or wireless segment. An attacker sends a crafted HTTP request to the device, triggering the dereference in sub_4019A0. The httpd process terminates, rendering the management console unreachable until the device is restarted. The public disclosure includes a documented exploitation path, so weaponization is straightforward for an attacker with LAN access.
No verified proof-of-concept code is published in a structured exploit database. Refer to the VulDB entry #302012 and the VulDB CTI record for the full technical write-up.
Detection Methods for CVE-2025-2959
Indicators of Compromise
- Unexpected termination or crash of the httpd process on the TEW-410APB device
- Loss of HTTP/HTTPS management interface availability while the device otherwise forwards traffic
- Device log entries or syslog messages indicating segmentation faults from /usr/sbin/httpd
- Repeated malformed HTTP requests originating from a single LAN or wireless host targeting the access point's management IP
Detection Strategies
- Monitor network traffic between client subnets and management IPs of TRENDnet TEW-410APB devices for anomalous HTTP request patterns
- Alert on availability loss of the device management port (TCP/80 or TCP/443) using periodic uptime probes
- Correlate device reboots or management-plane outages with preceding HTTP traffic bursts from LAN hosts
Monitoring Recommendations
- Forward syslog from the access point to a centralized collector and alert on httpd restart events
- Baseline normal HTTP request rates to the management interface and alert on deviations
- Treat administrative access to legacy embedded devices as privileged and restrict source IPs through switch ACLs or VLAN segmentation
How to Mitigate CVE-2025-2959
Immediate Actions Required
- Restrict access to the TEW-410APB management interface to a dedicated management VLAN or trusted administrator workstations
- Disable remote management features and limit HTTP access to wired administrative ports only
- Inventory TEW-410APB devices across the environment and flag the TEW-410APB running firmware 1.3.06b for replacement
- Plan migration to a currently supported wireless access point, as the TEW-410APB is a legacy model and the vendor did not respond to disclosure
Patch Information
No vendor patch is available. TRENDnet did not respond to the researcher's disclosure prior to public release. Organizations should treat the TEW-410APB running firmware 1.3.06b as an unpatched asset and apply compensating controls or replace the hardware.
Workarounds
- Place TEW-410APB devices behind a firewall that filters inbound HTTP traffic to the management interface from untrusted hosts
- Use network segmentation to isolate the access point management plane from general user traffic
- Monitor and automatically power-cycle affected devices if the httpd service becomes unresponsive, pending replacement
- Replace the device with a vendor-supported model that receives regular firmware updates
# Example: restrict management access to the TEW-410APB using an upstream firewall rule
# Allow only the admin workstation 10.10.0.25 to reach the device's HTTP interface
iptables -I FORWARD -p tcp -d 192.0.2.10 --dport 80 -s 10.10.0.25 -j ACCEPT
iptables -I FORWARD -p tcp -d 192.0.2.10 --dport 80 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
