Unauthenticated File Write Vulnerability in Netcore NR256CN Web Server
CVE-2026-112016

6.9MEDIUM

Key Information:

Vendor

Netcore

Status
Nr256cn
Vendor
CVE Published:
18 October 2026

What is CVE-2026-112016?

The Netcore NR256CN device, running versions up to 1.5.140116, is exposed to an unauthenticated file write vulnerability found in its Boa-derived web server. This flaw allows remote attackers to exploit non-existent .cgi paths to write malicious content into temporary staging files, which may lead to unauthorized tampering of firmware updates or configuration files. These actions can subsequently result in service disruptions or denial of service, posing a significant threat to device integrity and operational reliability.

Affected Version(s)

NR256CN 0 <= 1.5.140116

References

https://github.com/lukadqq/netcore-router-public-refs/blo...
technical-descriptionthird-party-advisory
https://www.vulncheck.com/advisories/netcore-nr256cn-thro...
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Zhou Ao
Yin Luxing
Lu Fangzhou
Liu Xin
.