CVE-2025-14191 Overview
CVE-2025-14191 is a buffer overflow vulnerability affecting the UTT 进取 512W router firmware up to version 1.7.7-171114. The flaw resides in the strcpy call within the /goform/formP2PLimitConfig handler, where the except parameter is copied without bounds checking. An authenticated remote attacker can manipulate this argument to overflow a fixed-size buffer, corrupting adjacent memory in the device's HTTP service.
The vendor was contacted prior to public disclosure but did not respond, and proof-of-concept details are publicly available. The vulnerability is tracked under [CWE-119] and [CWE-120].
Critical Impact
Remote attackers with low-privilege credentials can trigger memory corruption in the router's web management interface, potentially leading to denial of service or arbitrary code execution on the embedded device.
Affected Products
- UTT 进取 512W router (hardware revision 3.0)
- UTT 512W firmware versions up to and including 1.7.7-171114
- Deployments exposing the /goform/formP2PLimitConfig endpoint to untrusted networks
Discovery Timeline
- 2025-12-07 - CVE-2025-14191 published to NVD
- 2026-01-05 - Last updated in NVD database
Technical Details for CVE-2025-14191
Vulnerability Analysis
The vulnerability exists in the HTTP request handler bound to /goform/formP2PLimitConfig in the UTT 512W firmware. This endpoint processes peer-to-peer traffic limit configuration submitted through the device's web administration interface. When the handler parses the request, it passes the user-supplied except parameter directly to strcpy without validating the input length against the destination buffer size.
Because strcpy copies bytes until a null terminator is reached, a sufficiently long except value overruns the stack or heap buffer that holds the value. This corrupts adjacent control data, including return addresses and saved registers on MIPS-based router platforms typical of this product class. Successful exploitation can crash the HTTP service or redirect execution to attacker-controlled shellcode.
Public proof-of-concept details are available in the GitHub PoC Repository.
Root Cause
The root cause is the use of the unsafe strcpy function on attacker-controlled input without prior length validation. The firmware lacks compensating controls such as stack canaries or address space layout randomization on many embedded MIPS targets, which makes the overflow directly exploitable.
Attack Vector
An attacker requires network reachability to the router's web management interface and low-privilege authentication. The attacker submits a crafted HTTP POST request to /goform/formP2PLimitConfig containing an oversized except parameter value. No user interaction is required beyond the attacker's own request submission.
No verified exploit code is reproduced here. Refer to the VulDB entry #334611 for additional technical context.
Detection Methods for CVE-2025-14191
Indicators of Compromise
- Unexpected restarts or crashes of the router's HTTP management daemon
- HTTP POST requests to /goform/formP2PLimitConfig containing abnormally long except parameter values
- Outbound connections from the router to unfamiliar hosts following administrative interface access
Detection Strategies
- Inspect web server and HTTP proxy logs for POST requests to /goform/formP2PLimitConfig with payload sizes exceeding expected configuration field limits
- Deploy network intrusion detection signatures that flag long string values in router configuration POST bodies
- Correlate authentication events on the router admin interface with subsequent service crashes or reboots
Monitoring Recommendations
- Forward router syslog and HTTP daemon logs to a centralized analytics platform for longitudinal review
- Monitor for credential reuse against the UTT 512W admin interface from unexpected source addresses
- Track firmware version inventory across deployed UTT devices to identify unpatched units
How to Mitigate CVE-2025-14191
Immediate Actions Required
- Restrict access to the router web management interface to trusted management VLANs or jump hosts only
- Disable remote WAN-side administration if currently enabled on UTT 512W devices
- Rotate administrator credentials and enforce strong passwords to limit low-privilege attacker access
- Inventory all UTT 512W units and confirm firmware versions against the affected range
Patch Information
At the time of NVD publication, the vendor had not responded to disclosure attempts and no official patch is referenced in the advisory. Organizations should monitor the UTT product page and VulDB tracking entries for future firmware updates. Where no patched firmware is available, consider replacing affected devices with supported hardware.
Workarounds
- Place the device behind a network firewall that blocks inbound HTTP and HTTPS to the management interface from untrusted segments
- Use access control lists to permit administrative connections only from designated management workstations
- Disable the P2P traffic limit configuration feature if not in active operational use
- Plan migration away from end-of-support firmware where vendor coordination is unavailable
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
