Vulnerability-Lookup

GHSA-86XP-HG9P-72MV

Vulnerability from github – Published: 2025-07-16 21:30 – Updated: 2025-07-16 21:30

Details

A remote code execution vulnerability exists in multiple Netcore and Netis routers models with firmware released prior to August 2014 due to the presence of an undocumented backdoor listener on UDP port 53413. Exact version boundaries remain undocumented. An unauthenticated remote attacker can send specially crafted UDP packets to execute arbitrary commands on the affected device. This backdoor uses a hardcoded authentication mechanism and accepts shell commands post-authentication. Some device models include a non-standard implementation of the echo command, which may affect exploitability.

Severity

9.3 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

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  "affected": [],
  "aliases": [
    "CVE-2025-34117"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-16T21:15:26Z",
    "severity": "CRITICAL"
  },
  "details": "A remote code execution vulnerability exists in multiple Netcore and Netis routers models with firmware released prior to August 2014 due to the presence of an undocumented backdoor listener on UDP port 53413. Exact version boundaries remain undocumented. An unauthenticated remote attacker can send specially crafted UDP packets to execute arbitrary commands on the affected device. This backdoor uses a hardcoded authentication mechanism and accepts shell commands post-authentication. Some device models include a non-standard implementation of the `echo` command, which may affect exploitability.",
  "id": "GHSA-86xp-hg9p-72mv",
  "modified": "2025-07-16T21:30:36Z",
  "published": "2025-07-16T21:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-34117"
    },
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      "type": "WEB",
      "url": "https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/linux/misc/netcore_udp_53413_backdoor.rb"
    },
    {
      "type": "WEB",
      "url": "https://vulners.com/metasploit/MSF:EXPLOIT-LINUX-MISC-NETCORE_UDP_53413_BACKDOOR-"
    },
    {
      "type": "WEB",
      "url": "https://web.archive.org/web/20140828114943/http://blog.trendmicro.com/trendlabs-security-intelligence/netis-routers-leave-wide-open-backdoor"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/43387"
    },
    {
      "type": "WEB",
      "url": "https://www.seebug.org/vuldb/ssvid-90227"
    },
    {
      "type": "WEB",
      "url": "https://www.shadowserver.org/what-we-do/network-reporting/netcore-netis-router-vulnerability-scan-report"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/netcore-netis-routers-backdoor-rce"
    }
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  "schema_version": "1.4.0",
  "severity": [
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      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
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}

CVE-2025-34117 (GCVE-0-2025-34117)

Vulnerability from cvelistv5 – Published: 2025-07-16 21:02 – Updated: 2026-04-07 14:09

Title

Netcore / Netis Routers RCE via UDP Port 53413 Backdoor

Summary

Severity

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-07-17 18:23 UTC

CWE

CWE-912 - Hidden Functionality
CWE-306 - Missing Authentication for Critical Function
CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6104 records in the last 180 days details

References

7 references

URL	Tags
https://web.archive.org/web/20140828114943/http:/…	third-party-advisorytechnical-description
https://www.seebug.org/vuldb/ssvid-90227	third-party-advisorytechnical-description
https://raw.githubusercontent.com/rapid7/metasplo…	exploit
https://www.shadowserver.org/what-we-do/network-r…	third-party-advisory
https://vulners.com/metasploit/MSF:EXPLOIT-LINUX-…	third-party-advisoryexploit
https://www.vulncheck.com/advisories/netcore-neti…	third-party-advisory
https://www.exploit-db.com/exploits/43387	exploit

Impacted products

2 products

Vendor	Product	Version
Netcore Technology	Router firmware	Affected: Prior to August 2014
Netis	Router firmware	Affected: Prior to August 2014

Date Public

2016-12-15 00:00

Credits

Trend Micro TrendLabs

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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