CVE-2025-15431
Published: 02 January 2026
Summary
CVE-2025-15431 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Utt 512W Firmware. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 33.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Requires validation and sanitization of the 'filename' argument in /goform/formFtpServerDirConfig to prevent buffer overflow from improper input handling.
Enforces memory protections such as non-executable memory and stack guards to mitigate exploitation of the strcpy buffer overflow for arbitrary code execution.
Mandates timely identification, reporting, and remediation of the buffer overflow flaw, including monitoring for vendor patches despite lack of response.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow in web management interface (/goform/formFtpServerDirConfig) enables remote exploitation (AV:N/PR:L) for RCE or DoS, directly facilitating T1190 (public-facing app), T1210 (remote services), and T1068 (privilege escalation via vuln).
NVD Description
A flaw has been found in UTT 进取 512W 1.7.7-171114. This affects the function strcpy of the file /goform/formFtpServerDirConfig. Executing a manipulation of the argument filename can lead to buffer overflow. The attack can be launched remotely. The exploit has…
more
been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Deeper analysisAI
CVE-2025-15431 is a buffer overflow vulnerability in the UTT 进取 512W router running firmware version 1.7.7-171114. The flaw resides in the strcpy function within the /goform/formFtpServerDirConfig file, where improper handling of the 'filename' argument allows overflow conditions. It is classified under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-120 (Buffer Copy without Checking Size of Input), with a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). The vulnerability was published on 2026-01-02.
Attackers with low privileges (PR:L) can exploit this remotely over the network (AV:N) with low complexity and no user interaction required. By manipulating the 'filename' argument, an attacker triggers the buffer overflow, potentially achieving high impacts on confidentiality, integrity, and availability, such as arbitrary code execution or denial of service on the affected device.
Advisories from VulDB indicate the exploit has been publicly disclosed, including proof-of-concept code available on GitHub repositories. The vendor was notified early but provided no response or patch, leaving no official mitigation available as of disclosure.
Notable context includes the published exploit, which may already be in use by threat actors targeting exposed UTT 进取 512W devices.
Details
- CWE(s)