CVE-2025-34117

CVE-2025-34117 vulnerability

Severity

HIGH

EPSS

22.9%

EPSS pct

98th

Exploited

No known

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.

Affected vendor

See references

Affected product

See references

Weakness type (CWE)

CWE-78 — OS Command Injection
CWE-306 — Missing Authentication for Critical Function
CWE-912 — Hidden Functionality

Published

2025-07-16

Risk analysis

Its EPSS score of 22.9% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2025-34117

Confirm whether the affected software is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2025-34117.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2025-34117

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2025-34117 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2025-34117?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2025-34117.

Start free scan

No credit card. Agentless.

Related vulnerabilities

Indusoft Web Studio vulnerability