CVE-2025-66974 Overview
CVE-2025-66974 affects the Prolink 13A Smart Plug (Model DS-3202M-UKv3) and the accompanying mEzee mobile application version 2.6.7. An attacker on the local network can send a crafted packet during the device provisioning phase to trigger a denial of service or redirect the plug to connect to an attacker-controlled device. The flaw is rooted in improper input validation [CWE-20] in the provisioning workflow. Exploitation requires no authentication and no user interaction beyond the normal setup process.
Critical Impact
Attackers within network range during provisioning can crash the smart plug or hijack its cloud registration, redirecting the device to attacker infrastructure.
Affected Products
- Prolink 13A Smart Plug, Model DS-3202M-UKv3 (Wi-Fi firmware)
- mEzee mobile application version 2.6.7
- Prolink Smart Home ecosystem devices using the same provisioning stack
Discovery Timeline
- 2026-09-15 - CVE-2025-66974 published to the National Vulnerability Database
- 2026-09-15 - Last updated in NVD database
Technical Details for CVE-2025-66974
Vulnerability Analysis
The Prolink 13A Smart Plug relies on an insecure provisioning protocol to receive Wi-Fi credentials and cloud endpoint configuration from the mEzee application. During this setup phase, the device accepts network packets without validating their structure or origin. An attacker positioned on the same wireless segment can inject a crafted packet that either crashes the plug's firmware or overrides the legitimate provisioning data with attacker-controlled values.
The consequences are twofold. A denial of service outcome renders the plug unresponsive, requiring manual reset. A hijacking outcome causes the plug to associate with a rogue endpoint, breaking the trust boundary between the physical device and its intended cloud management service. See the GitHub PoC Repository for demonstration material.
Root Cause
The root cause is improper input validation [CWE-20] in the provisioning packet handler. The firmware does not verify sender identity, packet format, or field bounds before applying configuration values or forwarding data to internal parsers.
Attack Vector
Exploitation occurs over the network during the narrow window in which the smart plug is in provisioning mode. The attacker sends a malformed or spoofed provisioning packet targeting the device's setup listener. No credentials or user interaction are needed, and the attack completes in a single exchange. Reference product information is available on the Prolink2U Smart Home page.
No verified exploitation code has been published beyond the referenced proof-of-concept repository. The vulnerability mechanism is described in prose in the linked research.
Detection Methods for CVE-2025-66974
Indicators of Compromise
- Smart plugs entering repeated reboot or unresponsive states shortly after being placed into provisioning mode
- Outbound connections from Prolink smart plugs to IP addresses or domains outside the official Prolink cloud infrastructure
- Unexpected DHCP requests or SSID association attempts from Prolink devices to unknown access points
Detection Strategies
- Monitor wireless network traffic for unsolicited packets directed at devices in provisioning mode, particularly on setup SSIDs advertised by the plug
- Baseline the destination endpoints used by legitimate Prolink devices and alert on deviations
- Log and review all provisioning events initiated through the mEzee application to correlate against device behavior
Monitoring Recommendations
- Deploy wireless intrusion detection on segments where IoT devices are provisioned
- Isolate IoT provisioning to a dedicated VLAN with restricted external egress
- Capture pcap traces during known provisioning windows to build detection signatures for malformed provisioning packets
How to Mitigate CVE-2025-66974
Immediate Actions Required
- Perform smart plug provisioning only on trusted, isolated network segments free of unknown wireless clients
- Disable or physically power down Prolink DS-3202M-UKv3 devices when provisioning is not in progress
- Inventory deployed Prolink smart plugs and verify each device is registered to the legitimate Prolink cloud endpoint
Patch Information
No vendor patch or advisory has been published at the time of NVD disclosure. Consult the Prolink2U Smart Home page for firmware update announcements and monitor the mEzee application store listing for version updates beyond 2.6.7.
Workarounds
- Segment IoT devices onto a dedicated SSID and VLAN separated from user and corporate networks
- Restrict provisioning to short, supervised time windows and immediately return devices to operational mode after setup
- Block outbound traffic from IoT segments to arbitrary internet destinations, permitting only the vendor's known cloud endpoints
- Replace affected devices with alternatives that support authenticated provisioning if the vendor does not release a fix
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
