A buffer overflow exists in the gohead//sub_497498 component of UTT nv518G routers running firmware nv518GV3v3.2.7‑210919‑161313 (CWE‑119). The overflow can be triggered by a specially crafted network packet that overflows a memory buffer, causing the device to crash or reboot. The description does not note arbitrary code execution or data disclosure, so the impact is limited to loss of availability for the affected system.

The flaw affects UTT nv518G routers with the specific firmware build nv518GV3v3.2.7‑210919‑161313. No other vendors or product variants are listed as impacted by the advisory.

The CVSS score of 6.5 indicates a moderate risk. An EPSS score of less than 1% suggests that exploitation, while possible, is currently unlikely. The vulnerability is not listed in CISA KEV. It is inferred that a remote attacker would need to send a specifically crafted packet to the gohead interface to trigger the overflow, so exposure to untrusted networks increases risk.