UTT nv518G CVE-2026-52188
MEDIUMSeverity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Adjacent vector because management interface is LAN-bound; PR:N as no credentials required; A:H for device crash; no C or I impact confirmed.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
3DescriptionCVE.org
Buffer Overflow vulnerability in UTT nv518G nv518GV3v3.2.7-210919-161313 allows a remote attacker to cause a denial of service via the gohead//sub_497498 component
AnalysisAI
Denial-of-service via buffer overflow in UTT nv518G firmware (nv518GV3v3.2.7-210919-161313) allows an adjacent-network attacker to crash the device by sending a crafted request to the GoAhead embedded webserver's sub_497498 handler. The vulnerability is rooted in CWE-119 (improper bounds restriction) and requires no authentication, meaning any host on the same LAN segment can trigger device unavailability. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must have adjacent network access - specifically, be on the same Layer-2 network segment (LAN or WLAN) as the UTT nv518G device, as the GoAhead web management interface is typically not exposed to the internet. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is moderate and bounded by the adjacent-network attack vector (AV:A), which prevents internet-scale exploitation - an attacker must already be on the same LAN or WLAN segment as the device. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker connected to the same LAN segment as a UTT nv518G router - such as a compromised workstation, rogue wireless client, or malicious insider - sends a specially crafted HTTP request targeting the sub_497498 handler in the GoAhead webserver. The oversized or malformed input triggers a buffer overflow in firmware sub_497498, corrupting memory and causing the webserver process or entire device to crash and reboot. … |
| Remediation | Upgrade the UTT nv518G firmware to the latest available version via the UTT download center at https://utt.com.cn/downloadcenter.php?filetypeid=3&model=518G&lang=zhcn; at time of analysis no specific patched firmware version has been independently confirmed by NVD or a formal vendor advisory, so 'Patch available per vendor advisory' applies with the caveat that version confirmation should be sought directly from UTT support. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-119 – Buffer Overflow
View allSame technique Denial Of Service
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External POC / Exploit Code
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