Critical Buffer Overflow Vulnerability in UTT 进取 520W Router (CVE-2025-14141)

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Overview

This article details CVE-2025-14141, a high-severity vulnerability affecting UTT 进取 520W routers, specifically version 1.7.7-180627. This vulnerability is a buffer overflow in the strcpy function within the /goform/formArpBindConfig file. Successful exploitation allows remote attackers to potentially execute arbitrary code on the device.

The vendor was contacted regarding this disclosure, but no response has been received. A proof-of-concept (PoC) exploit is publicly available, increasing the risk of exploitation.

Technical Details

The vulnerability resides in the strcpy function within the /goform/formArpBindConfig file of the UTT 进取 520W router’s firmware. The strcpy function is used to copy data from a source buffer to a destination buffer. When the size of the source buffer exceeds the capacity of the destination buffer, a buffer overflow occurs.

In this specific case, manipulating the pools argument passed to the /goform/formArpBindConfig endpoint allows an attacker to provide an overly long string that overwrites adjacent memory regions. This could lead to code execution and complete compromise of the router.

CVSS Analysis

  • CVE ID: CVE-2025-14141
  • Severity: HIGH
  • CVSS Score: 8.8

A CVSS score of 8.8 indicates a high-severity vulnerability. This is due to the remote attack vector, the relatively low attack complexity, and the potential for complete system compromise (Confidentiality, Integrity, and Availability impact).

Possible Impact

Successful exploitation of CVE-2025-14141 can have serious consequences, including:

  • Remote Code Execution (RCE): Attackers can execute arbitrary code on the router, gaining full control of the device.
  • Data Theft: Sensitive data stored on or transmitted through the router can be compromised.
  • Denial of Service (DoS): The router can be rendered unusable, disrupting network connectivity.
  • Botnet Recruitment: The compromised router can be used as part of a botnet for malicious activities such as DDoS attacks or spam campaigns.

Mitigation or Patch Steps

Currently, there is no official patch or firmware update available from UTT to address this vulnerability. Given the lack of vendor response, the following mitigation steps are recommended, though they may not be fully effective:

  • Restrict Remote Access: Disable remote administration access to the router. If remote access is necessary, implement strong authentication measures, such as multi-factor authentication (MFA) and complex passwords.
  • Network Segmentation: Isolate the router on a separate network segment to limit the potential impact of a compromise.
  • Firewall Rules: Implement firewall rules to restrict access to the /goform/formArpBindConfig endpoint, limiting exposure to potential attackers.
  • Monitor Network Traffic: Closely monitor network traffic for suspicious activity that may indicate an attempted exploit.
  • Consider Replacement: If possible, consider replacing the UTT 进取 520W router with a more secure device from a vendor with a better track record of security updates.

References

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