EUVD-2026-41225
GHSA-2fgx-9w4g-59gc
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-reachable gohead service, no auth or interaction, low-complexity crash yields availability-only impact (A:H) with no confidentiality or integrity effect.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
CVSS:3.1/AV:N/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_448384 component
AnalysisAI
Denial of service in the UTT nv518G gateway/router (firmware nv518GV3v3.2.7-210919-161313) lets a remote attacker crash the device by sending crafted input to the gohead/sub_448384 (FUN_00448384) handler, triggering a stack-based buffer overflow. The CVSS 3.1 vector marks it network-reachable and unauthenticated with high availability impact but no confidentiality or integrity effect. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the UTT nv518G's 'gohead' web/management service and delivery of malformed input to the gohead/sub_448384 (FUN_00448384) request-handling path; per the CVSS vector (AV:N/AC:L/PR:N/UI:N) no authentication and no user interaction are needed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score is 7.5 (High) with vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - network-reachable, low complexity, no privileges or user interaction, availability-only impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who can reach the nv518G's gohead management service sends a single crafted HTTP request with an oversized field that overflows the stack buffer in FUN_00448384, causing the service or device to crash and drop network connectivity. Because a public CVE report with proof-of-concept details exists and the CVSS vector requires no authentication, user interaction, or elevated privileges, the attack is low-effort and repeatable against an exposed device. |
| Remediation | No vendor-released patch version is identified at time of analysis; the vendor advisory data only points to UTT's general download center (https://utt.com.cn/downloadcenter.php?filetypeid=3&model=518G&lang=zhcn), so administrators should check there for a firmware build newer than nv518GV3v3.2.7-210919-161313 and apply it once available. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
24 hours: Inventory all UTT nv518G routers running firmware nv518GV3v3.2.7-210919-161313 or earlier; assess network exposure and document business-critical dependencies. …
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Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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