Netcore NR255-V EUVD-2026-80035

Q: What is the CVSS score of EUVD-2026-80035?

EUVD-2026-80035 has a CVSS 4.0 base score of 5.3 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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. EPSS exploitation probability: 0.2%.

| CVE-2026-76863 MEDIUM

Incorrect Authorization (CWE-863)

2026-09-15 disclosure@vulncheck.com

GHSA-pxfg-875r-4xm4

Authentication Bypass Information Disclosure

5.3

CVSS 4.0 · Vendor: vulncheck

Severity by source

Vendor (vulncheck) PRIMARY

5.3 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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

Primary rating from Vendor (vulncheck) · only source for this CVE.

CVSS VectorVendor: vulncheck

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Sep 15, 2026 - 22:34 vuln.today

DescriptionCVE.org

Netcore NR255-V version 1.5.130703 contains a sensitive information disclosure vulnerability in the mod_qos_bandwidth plan.json handling within filter_conns_dump_cgi.c and IGD_CgiCall.c. Authenticated users with broad roles can access these QoS read routes to obtain live network telemetry beyond their intended privilege level.

AnalysisAI

An incorrect authorization flaw in the Netcore NR255-V router (firmware 1.5.130703) lets any authenticated user with a broad or low-privileged role pull live QoS/bandwidth telemetry from the mod_qos_bandwidth plan.json read routes, exposing network activity data they are not entitled to see. The bug is rooted in missing role checks within filter_conns_dump_cgi.c and IGD_CgiCall.c, so the endpoints return connection and bandwidth statistics regardless of the caller's privilege level. …